They get a bonus just not as big as the members of the winning team.
By winning the Super Bowl.
Joe Flacco was on the winning Super Bowl team once.
Joe Namath was the winning quarterback in Super Bowl III.
Joe Willie Namath
I believe so, Yes
According to About.com the losing players get paid $42,000 as a bonus for making it to but not winning the Super Bowl. The same site says that the winning team's players get $83,000. Also, the Super Bowl MVP usually gets a special prize, in recent years it has been a new car.
Bills or Vikings.
A team qualifies for the Super Bowl by winning either the AFC or NFC Conference Championship game.
The winning quarterback of the 1969 Super Bowl III was New York Jets Joe Namath.