No, but a good start! The Lotus 25 of 1962 was the first sheet metal monocoque F1 racing car, I believe. It had disc brakes, rear engine and independent suspension, but not the other required attributes of 4WD and forced induction. Interestingly, Jim Hall's Chaparral 2, debuting in 1963, had all those same attributes of the Lotus, except its monocoque was fiberglass. I believe we may classify the 1955 Jaguar D-Type as monocoque and having disc brakes, but Jaguar would not go IRS until the E-Type.