invention of cars when & by whom?

Answer 1

Depends on your definition of a car... steam, internal combustion, etc.

Try here:
http://en.wikipedia.org/wiki/Automobile

Answer 2

This is from memory, you might want to look it up somewhere, but as I recall there is a lot of credit, a lot of people invented the car at about the same time, but I think generally the credit goes to Germans--a familiar name, whether it is Benz or Daimler, some such German name. French also had a very strong claim, as did the British and the Americans.

Answer 3

the first self-propelled car was built by Nicolas Cugnot in 1769 which could attain speeds of upto 6 kms/hour. In 1771 he again designed another steam-driven engine which ran so fast that it rammed into a wall, recording the world’s first accident.

In 1807 Francois Isaac de Rivaz designed the first internal combustion engine. This was subsequently used by him to develop the world’s first vehicle to run on such an engine, one that used a mixture of hydrogen and oxygen to generate energy.