My 15U baseball team is starting fed baseball this summer. What equipment do we need, and how much of it.

I am getting more interested in baseball now since I made the baseball team for my high school, and collecting baseball cards seems fun. What are some good grands to buy a pack from, and can I get them from like Wal-Mart and Target? And as of right now, I just want to buy modern day baseball cards, not like the expensive baseball cards from decades ago. How do I know which cards are good and bad?

I recently came into possesion of a baseball that is signed by numerous members of the 1950 New York Yankees baseball team. I am a diehad Yankees fan and was estatic when I got it. The ball is signed by all of the greats: Joe DiMaggio,Yogi Berra,Phil Rizzuto,Johnny Mize, & Whitey Ford. There are also a bunch of others as well.