Yes, Tom Coughlin is the oldest head coach to win a Super Bowl.
Tom Coughlin age 65 in Super Bowl XLVI
Yes. Prior to Coughlin's 2012 Super Bowl victory, Dick Vermeil of the Rams was the oldest Super Bowl winning coach.
Dick Vermeil of the Rams who won Super Bowl XXXIV at the age of 63.
Former Head Coach and current analyst Brian Billick was the coach for the 2001 Super Bowl win; current Head Coach John Harbauch coached the Ravens to their second Super Bowl win in 2013.
Chuck Noll was the Steelers head coach for their first Super Bowl win. Noll went on to win four Super Bowls in all.
Bill Callahan was head coach of the Raiders last Super Bowl team (SB XXXVII).
Tom Flores won a Super Bowl as backup quarterback for the Chiefs in Super Bowl IV and as head coach of the Raiders in Super Bowl XV.
Tom Landry
Hank Stram.
Otis Anderson
No, an interim HC has never coached a Super Bowl team ... win or lose.