FIRST of all, sorry to hear about the loss of your dad.
Now... to the radio stuff: A model number, as requested, would help us here.
A 2500, in this particular case, is actually better than a 3000. The XTS-2500 is still in production, the XTS-3000 is not. This is an expensive, professional, radio... retail price new? Probably around $3,000.
You've got a good flashcode... based on that it's almost certainly a police or fire department radio. So, it could be used for listening to various local police/fire frequencies, SORT of like a scanner. It can also probably be used as a ham radio, if you had a ham radio license.
By the way, IF by some chance you find a way to charge it, please be careful, VERY careful, to not transmit with the radio until you have it checked out and re-programmed. No joke. Not only can officer safety be at stake, but with that particular type of radio it is possible for the your radio to be detected and "stunned" (made inoperable), right over the airwaves.
The radio needs a specific charger to charge the battery, as well as a special cable and software to read or program the radio. None of these things are inexpensive (the software, for example, is about $275, that cable another $100 or so), I'm sorry to say.
Depending on its condition, the model, and the band on which it operates, your radio is probably worth between $600 and $1000.
You could probably get it checked out and re-programmed to RECEIVE ONLY on local PD/FD channels, if you can find a cooperative local Motorola dealer (or from somebody here on RR). They'd probably charge you between $50 and $100 to program it, probably about the same to "bench" it (tune it up and be sure it works according to specs).
Unless you really want this specific radio for sentimental purposes, your best course of action would probably be to sell it (here on RR for example) and buy a kick-ass scanner if you were interested in radio stuff.
Peter
K1PGV