Baby Names Beginning With "O": Meaning: Arctic Hare?

Questions

Doc Brown knew Biff stole the car because part of Biff's _ was found in it?

The rich Biff has the Almanac hidden behind a?

The song played when Marty's parents first kiss at the dance?

The speed required in mph for time travel to occur (in WORDS,eg sixty one)?

When Marty travels to the year 2015, the Jaws film that's playing: ____ __?