started team

First of all, if you'd like to start charging people, you'll want someone to run your accounts and expenses and all that, because you will have to A)become insured and B)chronograph everyone and make sure they have safety equipment on at all times. Basically, I suggest you just play by yourselves or with other people who want to play real cheap.
Second, if you want to advertise that you're there, ask the paintball places around you to tell kids about you. They'll probably say no (almost guaranteed they will in fact), but it's worth a shot at least. Also, you could put up signs, you know, like stapling them to telephone poles and what-not.
Lastly, good luck.