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?
You likely already know this but if anybody else reading is interested, this is because if you test for your commercial license in an automatic then you’re restricted to only automatics. The schools are still teaching manual, so it doesn’t make any sense to learn that then test in an automatic and get that restriction.