Well, first off I would buy myself a pink iPod nano and a laptop. Then I would move my family to Hawaii or I would buy us a vacation house that we could go to all summer and on holidays. Then I would go on a shopping spree in New York City or in L.A. I might donate some to charity, I don't know though.
Then at my house I would build an indoor basketball court and we would get a pool. I would buy my little sisters like 500 stuffed animals each and maybe a car for my dad and something Gucci for my mom! Sounds good, right? I think I would save the rest for college and other stuff I might need in my future.