If you look right back, his first World Rally Championship Event was in a Citroen Saxo S1600 (Junior Championship) BUT his first proper World Rally Car was the Citroen Xsara WRC
Sebastien Vettel won his first title with Red Bull Renault, who also won their first Constructer's Championship.
That was the 1956-57 season.
Well apart from winning the championship in his second season which is rare enough he narrowly (by 1 point) missed winning the championship in his first season which would have been totally unheard of. He is also the first black driver, first black world champion and uniquely has said he wants to remain with the McLaren team for his F1 whole career
Richard Petty drove a Plymouth in his first Nascar championship season, which was 1964.
The first season for the modern World Driving Championship for F-1 cars was 1950
In the 1909-10 season.
The Colts first championship came in the 1958 season when they defeated the New York Giants in overtime, 23-17, in the NFL championship game. The Colts first conference championship was also in 1958.
The champion was Sebastien Vettel. It was his first F1 championship win and it was a big suprise that he won because before the last race he was 3rd in the points standings. Hope this helps!
Ralf Schumacher made his formula one debut in the 1997 season for the Jordan F1 Team. He drove car no. 11 in his first season. He finished his debut season in 11th place overall with 13 championship points. His best finish was the 3rd place he achieved in the Argentine GP.
I think 1920:)
1950 was the first FIA F1 Championship season. Also first season to have WDC. The WDC was Giuseppe Farina with 30 points which included 3 wins.
The Steelers won their first championship in the 1974 season. They defeated the Minnesota Vikings in Super Bowl IX.