qustions bout my ride

i have a 07 grand prix, stock
what could i do without spending over 500 to give it a little more oomff?
my dad just bought it for me and doesnt want me doing to much to it.

also i have to friends in school
one with a 02 camaro v6 stock
and the other has a 94 or 96 v6 stock

what would be my chances if i were to take a race against them?

A chip set would be the quickest hp/torque gain. Pay attention to your dad. You can blow alot of money on this car and wind up loosing everything in your fisrt accident. Insurance don't cover the extras and you sound very inexperienced. If you know your friends cars and still have to ask what your chances are, then I suggest you watch from the sidelines.
Just consider it "the knowledge of time" speaking.

that 07 grands prix will walk all over both of those cars