My Dad used to bring home computer paper, the kind that had holes punched in both sides, and went through a dot matrix printer - their work computers obviously used to waste 10 or 20 sheets between print outs. I'm not sure we ever bought any.

Our first computer had 32K, and started out with audio cassettes, but we bought a disk drive for it later. Suddenly games loaded in 30 secs or so, rather than 5 mins.