You do not 'format' a scanner; you program it. It would be very helpful if you would state where you are (county/state is fine). That way you have a chance for like minded scannists from your area to respond
Look at the links in the wiki article I supplied in this thread. It links to many resources to help you along.
I would suggest one way to start would be to settle on a package (they all have a free trial period), and get your PC and scanner talking to one another. Once that's done, go to your respective state's forum and ask for a file for that application for your area. This is sometimes one way to get the light bulb to turn on. There is a learning curve, no doubt about it, with all the terminology and the concepts of trunking that is sometimes tough to get. Sit down and read. There's lots of good folks around here that can help
Mike