If I use napster to go does that mean I can download music and transfer it to my mp3 player or do I have to purchase the music first as well as paying monthly?

I think you have to pay a flat fee to napster then you can download x-amount of mp3's. you can do whatever you wish with the as long as you paid for the d/l.

i think you pay per month but im shure once you download the songs they are yours to do with as you wish