How many dollars does a university student need to live in America?

I am 16 years old and I live in Greece.I want to study in a Music University in America, but my parents cant afford that so I am saving up money to pay for t University and food and stuff.But I really don't know how much I need for all that.(pay the University, food, somewhere to live/stay, a job.) Does anyone know????And also,are there Universities in America that are not payable?