tv/ movies: Wizard Of Oz: Second kind of animal heard in the MGM film.?

Questions

who was the star of the post appocolyptic sci-fi film a boy and his dog?

in soylent green, what was the last resort used for riot control?

what was the name of the monster that attacked luke in the trash compactor in star wars?

texas chainsaw massacre, there was a guy in a wheelchair. what was his name?

what other relative of travolta's made a cameo in saturday night fever?