Sam2: It’s a rashi on the verse where Yakov tells Pharaoh that his life was “short bad and shorter than my fathers'” I don’t know who Rashi is quoting.
popa: The answers to your questions, as well as the questions themselves, are all found in Meseches Bava Mayseh daf alef amud gimmel. (except for l’tzror)
On what day did all the olei bavel agree to a ban on intermarriage?