I am in my 2nd year as PTO President at a new school. We did most everything from scratch and got a lot of information online from other schools. I have learned a lot by starting up a PTO at a new school. It really depends on the dynamics of your school and the makeup of the people there. We made up bylaws, picked a mascot, school colors, and lots more. I will be glad to help you if you need some advice.
Good for you for starting a parent group at your school. The whole community is sure to benefit from it! You're in the right place. There is tons of useful information on this site for free as well as many useful kits and tools you can purchase. I personally haven't used the Start Up Kit but many others have and have come back here to rave about it. Check it out at: