If you have no credit, apply for a credit card. Yes, I know what you're thinking, everyone tells you to sty away.. But, If you have financial assistance, scholarships, or a job, you are paying for school and books regardless. Pay for your books with your credit card, then use your financial aid to pay off the credit card. Doing this will slowly build your credit, and if you pay it off right away there will be no interest added.
To make money from this, get a card that offers a rewards program. some of them are free, some have a fee. But if you take the rewards you get, transfer the points to cash. once you have the cash, put it in a saving account, and slowly build interest from there!