MJM -
You may want to post your note in the specific state section (MS) of the forum. People who look in that portion of the forum will be more familiar with your specific area and could likely be more helpful on frequencies suggestions, etc..
You can purchase scanners either on-line from many locations (e.g. Scannermaster, Radio Shack, etc.), or from a physical location. If you are near a Radio Shack that might be a good place to start.
You have come to the right place here a Radio Reference - you can find the most useful and concise information - go to the Wiki section and look under radio models. Also, you can learn a lot just going through the forums here on Radio Reference (start by looking in the "Getting Started" forum section).
I am sure others who have many years experience will respond to your note as well.
Good luck - Wthom100