Yes there were Fords, Pontaic etc.
The first production car was made in 1889 by Karl Benz of Germany and little later came the Stanley Steamer ( this is the same man who built the famous Stanley Hotel in CO) a car that ran on steam. By 1908 Ford was producing cars for the American Market. WW2 happened in 1939 so by this time there were many car companies producing cars in the United States.
Uh, Duh. There were tanks, of course there were cars. They had planes also!
There were cars well before World War 2. Before World War 1 even.
yes
All passenger cars
Yes, there were.
Yes, almost every country in the world had cars by WW2.
World War 2 cars were much tougher than today's cars, and today's cars can go much faster, there are more differences to them too so these aren't the only two differences.
car manufacture was suspended during war
PROBOBLY because we defeated them in World War 2
yes
No.
Any body that could or wanted to.
During World war 2 they used trains, trams, buses few people had cars as they were not affordable.