80s Films: Iron ___?

Questions

in the game 'banjo-kazooie' who is tooty's big brother?

in the godfather, who played the role of mo green?

in the law of torts, oral defamation or use of the spoken word to injure another's reputation, as distinguished from libel or written defamation?

in the monty python parody 'search for the holy grail' what did patsy say when they reached camelot?

in the monty python parody 'search for the holy grail' what was arthur's trusty servant's name?