1) School age seems reasonable, there are plenty of places in the world you see kids off to school on public transit.
2) They will buy a self driving car and work less as it does the job for them.
3) The same way it does now
4) I hardly actual drive my car on the highway now, I just let it do its thing.
5) I do not live my life in fear and have never spent a second worrying about this in another facet of my life. It is just so overly complicated a scenario, satire of a cartoon villain evil plot.