FAQ for
The Ladykillers (1955) More at IMDbPro »

For detailed information about the amounts and types of (a) sex and nudity, (b) violence and gore, (c) profanity, (d) alcohol, drugs, and smoking, and (e) frightening and intense scenes in this movie, consult the IMDb Parents Guide for this movie. The Parents Guide for The Ladykillers can be found at http://www.imdb.com/title/tt0048281/parentalguide[/link.

No. This is an original screen play written by American writer, William Rose, after he had a dream in which all he had to do was remember it enough to write it all down.

None, they live happily ever after.

All five of the criminals die, basically by killing each other off.

The old Lady gets to keep all of the money because no one believes her.