Hi again.That's Entertainment is from an MGM musical,"The Bandwagon",but it was also used in 3 films called "That's Entertainment" which included highlights from many MGM films.Amazon may have a soundtrack CD.The ride only uses a small instrumental excerpt while the cars move into the final theater.
The curse of the jewel uses music from "Raiders of the Lost Ark".I'm not sure about the western/bank robbery scene.The "Casablanca" scene uses "As time Goes By".
I don't remember music in the Tarzan scene.I believe the footlight parade uses "By the Waterfall" from a Busby Berkley film.
I just read an interesting story at jimhillmedia.com about the movie ride.They originally wanted to use more of the "Wizard of Oz",but were restricted to using only a few minutes.After the munchkinland scene,you were supposed to move into the Wizard's throne room.
The giant head of the Wizard would appear to introduce the finale with the film montage,but they had to cut that out.
Would appreciate any corrections.