You will have to program them in, but the information you posted is deprecated, meaning, no longer used. Ignore the link the previous poster sent you as that system is no longer used, Polk is now on a pure P25 system. Frostproof FD is now dispatched by Polk County FD.
This is where you need to get frequency information from....
Polk County (Project 25) Public Safety System Trunking System, Bartow, Florida - Scanner Frequencies
I would say find someone to program it for you but I think it is important to understand the subject/ I think you should read your scanner manual or
Trunking Basics - The RadioReference Wiki so you can understand trunking better.
Good luck, there's a lot to be learned.