Gotta agree w/ the "Go .22lr" crowd. Check out rimfires on the following, with your guardian-type parental units (whoever is going to "gift" it to you... legal technicality, but important nowadays). As others have already mentioned Rugers 10/22, check out Marlin and Remington.
http://www.marlinfirearms.com/
http://www.remington.com/products/fi...imfire_rifles/
Then... w/ "parental unit" in tow (let them drive maybe?) maybe check out local shops or pawns for lightly used versions of your choice. Before last Nov. you could often find pretty good deals on Marlin 60s in pawn shops. Those little Marlins are plenty accurate for target shootin', tree rats and cottontails.
Should centerfires float your boat, look for a Savage in .223 perhaps or if deer are in your sights, a .243 or 7-08.
http://www.savagearms.com/
I'd also add, stick to open sights until you've got that down cold, (darn these kids w/ youthful, perfect eyesight anyway) only thinking optics once you've got the basics down pat.
Those 3 (or 4 if you add Ruger) are pretty fine firestick manufacturers and have affordable models for beginners that will last you a lifetime (and maybe your kids and grandkids sometime down the road).
Consider also (never too early to learn) joining the NRA for learning info about arms, safety, hunting and the political reality of firearms ownership in the US.