You might want to learn to play before you start a band... just go to a local music shop and try to find a cheap electric guitar. The salesmen will help you find a good one. You'll also want a good amp.
I'm 14 and im also a guitarist. I started out with a Fender startocaster, and never liked it but as i got better i bought my self a Les Paul. Im working on enough money for a Jackson. And a good beginner guitar is a gibson sg. Like what VinceKaser said. Also get a good amp. Guitar plays it amp says it.