Scholarships, loans, and work is how I did it. The scholarships covered tuition, loans and earned income covered living, lab fees, and books. I lived in a small apartment complex and acted as an assistant manager in lieu of rent part of the time. I sold calligraphy (certificates, your name in calligraphy, mailboxes and street signs) and art (illuminated love poems/poison pen poems, decorated letterhead designs, wedding invitation designs) and did some studio portraiture photography. I also graded a billion papers, did odd jobs on and off campus--I.D. photos, repairs, hauling, cleanup, drafting home additions/remodels, writing short pieces for newspapers on events, selling cartoons to newsletter editors, stereo repairs, typewriter repairs.
I also got fed by friends in clubs (historical recreation group, astronomy club, computer club) when all I could afford for myself was a sack of potatoes (no margarine, just salt.) I checked out textbooks from multiple libraries to get through the quarter without buying (interlibrary loans make this work, along with reading ahead and study groups where you can get exercises from others during gaps.)
The loans were hard to swallow at the time, but I used the money carefully and it worked out.