What exactly can I put on my college application?

I am still two years away from college and I have never even seen a college resume so I was just wondering, what can I put on my college application? What I mean by this is can I put things such as playing guitar and piano (which I do) on my application. I played saxophone for my middle school band so I am assuming I can add that because I did that in school but can I add things that I did on my own at home, for example I took guitar lessons and taught myself how to play piano. Obviously, I wont say things like playing video games but I do make movies on my own time and I am hoping to go to school to become a director so could I also mention that? And what about sports, I have played recreational sports for just about all of my life but I have not and do not play for my high school, will the sports still count? Sorry this is a long post but I am just very curious.