tv/ movies: Monty Python: Name of the kid who falls out of window?

Questions

Classical Music : Conductor for Fantasia.?

Classical Music : French composer known for the operas Carmen, Djmileh, & The Pearlfishers.?

Classical Music : He was a patient of Freud's for a short time.?

Classical Music : He wrote over 100 symphonies...and he created the string quartet.?

Classical Music : His principal works are the operas Wozzeck & Lulu.?