Here is your info. And for another 10 points I will do your presentation for you too. lol
For frequencies, look at the RadioReference.com site If this is a digital system, you will need a scanner that can receive the APCO-25 format. Both Radio Shack and Uniden make scanners that will work. I like the Uniden myself.
check any place that carries Uniden phones - Circuit City would be my first stop, the Radio Shack. You might also look onto the Uniden website )