Ok welcome to the forum first off. This will be the one place you can get all of your questions answered, or supported at least. So you did something right by coming here.
Now, one thing I'd like to point out is its called TRUNKED not trunkated, I have no earthly idea where you got that name from but it isn't valid for anything I know of. Not that it really matters to your issues, but it was just bugging the hell out of me that you were incorrectly wording it heh heh...
The BC-246T IS A TRUNKTRACKING SCANNER. So yes, it will do trunking. Thats the main focus of that radio. I highly suggest you read the manual, and then reread the manual, and after that, READ IT AGAIN! Everything you need to know in order to properly program that scanner is in the manual. It will just take you some time to get acustomed to it. I'll tell you that the 246 IS NOTHING LIKE THE SCANNERS YOU WERE USE TO BEFORE. And the way TRUNKING works is NOTHING like CONVENTIONAL. So throw out all of the knowledge you have learned about conventional because its useless when dealing with trunking. You're just going to have to start from scratch and learn it.
Let me explain the basics of trunking in lamen's terms...
Let's say you are at a fast food restaurant. And there is a single line formed for all of the patrons. And lets say you have 6 patrons in line waiting for a free register so someone can take their order. Ok now visualize a counter with 5 registers with an employee at each, and one manager standing in the background making sure everyone is properly served without any problems. As a register becomes available the next person in line walks up and the order is taken right? right... Ok well here is how this has anything to do with trunking...
The patron would be considered a "user" on the trunked radio system
The register would be considered a "repeater channel" on the trunked radio system.
The manager would be considered a "Control Channel" on the trunked radio system.
Now, lets say your area that will use the trunked system has 20 users (these can be broken down into alpha police department, yankee fire department, hotel sheriff's office and so forth you get the idea)... Ok so you have 20 users (or patrons in fastfood)
Ok and the trunked system has 6 repeater channels (or frequencies). (these 6 repeaters are the registers in fastfood) Out of those 6 repeater channels, or frequencies ONE WILL BE A CONTROL CHANNEL, and it usually rotates between 2 or 3 of the repeater channels every few hours or days. The remaining 5 channels will be used to service the users.
Now the control channel is managing the entire system. When officer brown with alpha pd keys his radio, the control channel will get the signal that he keyed his radio and wishes to talk, the control channel (or CC for short) will then assign one of the available 5 repeater channels and allow him to begin talking. That is the job of the control channel, to route everyone's transmissions to an available repeater channel on the system, and on the correct talkgroup. (i'll get into talkgroups in a second because that is actually what you brought up in your post)
You're probably wondering well how does all of those users keep seperate if they're all sharing the same 5 (or however many) repeater channels there are on a trunked system. Part is the control channel, and it does it by the use of what we call TALKGROUPS.
Imagine a talkgroup like a folder (or directory) in a computer. It's very much like that.
Your computer has a hard drive right? And on that hard drive you have A LOT of different data right? Well you can't keep all of that data in one place, you have to seperate it, and you do this by the use of directories and sub-directories (or folders).
The trunked system works the same way. EACH AGENCY (OR USER) HAS ITS OWN DIRECTORY (called a ZONE) on the trunked system. and within their zone they have SUB-DIRECTORIES (called a TALKGROUP).
So lets use Alpha PD for example... Alpha PD has one zone on the trunked system, called Alpha PD (this part, the zone is transparent to you, meaning you don't need to worry about it) But within that zone, they have 3 distinct talkgroups. What conventional scanners would call a "CHANNEL" So they have a talkgroup called "DISPATCH" a talkgroup called "CARS" and a talkgroup called "DETECTIVES" ok so each of their radios will have these 3 talkgroups (or what you would understand it to be as a CHANNEL)
When Officer brown has his radio set to DETECTIVES talkgroup, and keys his radio, the CC will assign him a free repeater channel out of the 5 available on the system, and allow him to talk. Anyone else with a radio on the Alpha PD Zone monitoring the DETECTIVES talkgroup will hear Officer Brown talk. And they of course can respond back.
So a talkgroup is what would be a CHANNEL by conventional standpoint. Its called a TALKGROUP though, don't call it a channel.
Ok now, on to what you said. The info you provided are not frequencies, THOSE ARE TALKGROUP ID CODES. The DEC and HEX are TALKGROUP ID NUMBERS. This is how you know what agency is talking and what talkgroup they're talking on.
What you want to do is go back to the database where you saw that information, and above all of the HEX/DEC info you'll see a list of FREQUENCIES they'll be something like 856.7375 868.6675 866.2375 and so on (those are examples btw) THOSE are the REPEATER CHANNELS. You will need to take your scanner and program each of those frequencies into your scanner and it needs to be programmed in either Motorola or EDACS depending on which system you're trying to listen to. I'm using MOTOROLA btw in these examples.
Once you have all of the frequencies programmed in and setup properly for the type of system (motorola or edacs etc.) then when you scan the scanner SHOULD lock in to the CONTROL CHANNEL and will sit there until someone keys their radio. At that point you'll see the TALKGROUP ID display on the screen and you should hear the traffic.
The list of talkgroups you see is for your convience. You can manually enter those into your scanner OR when you see one come up on your screen SAVE IT TO MEMORY and then you can rename it with the correct agency name etc from the list. You're really going to need to delve into that manual and learn how to do all of this.
I hope this made sense to you. If not ask more questions, and I and others will try to help you out.