I suppose it would be mostly practical skills, cooking, fixing things. Usually had to be done by people themselves.
Maybe also mental things like navigating (with or without paper map) and remembering their daily and weekly agendas.
What other things would be a big difference with the people today?
Almost every adult in the UK learns on manual - I’ve known about three people in my life who learned on automatic and are only licensed to drive automatics - but with the rise of electric cars (and an increase in automatics generally) I wonder if my kids will learn.
What I never learned, but which my parents did was exactly when and to use the choke on a car. I know fuel injection made chokes unnecessary and I’ve never driven a car that had one.