What was the first car with four wheel disk breaks ?

Answer 1

Not sure which specific car, but found when cars starting having 2-wheel then 4-wheel disc brakes: http://www.edmunds.com/ownership/techcenter/articles/43857/article.html
It says "One of the first steps taken to improve braking came in the early '70s when manufacturers, on a widespread scale, switched from drum to disc brakes. Since the majority of a vehicle's stopping power is contained in the front wheels, only the front brakes were upgraded to disc during much of this period. Since then, many manufacturers have adopted four-wheel disc brakes on their high-end and performance models as well as their low-line economy cars"

Answer 2

As far as American autos, it was the 1967 or 68, Z-28 Camaro. Not sure about foreign autos.