Number 3 was delivered by Marilyn Monroe in her last movie. It was also Clark Gable's last movie and was directed by John Huston. A band was named after this movie whose lead singer was named Danzig.
Number 4 was spoken by Barry Fitzgerald in a John Ford movie starring John Wayne and Maureen O'Hara. The movie was in Technicolor, O'Hara was a redhead, and Ireland, where it was filmed, was quite green.
Number 5 was spoken by Shirley MacLaine in a Billy Wilder movie also starring Jack Lemmon. It won Best Picture for 1960. If it'd be made in the UK, it might've been called The Flat.
Number 6 is also from a John Huston movie. The line was spoken by José Ferrer, whose character, a famous artist, was the focus of the story, despite its name, which suggests it's about the same place as the identically titled 2001 movie starring Ewan McGregor and Nicole Kidman.
Number 7 is a 1941 Preston Sturges movie. The line was Barbara Stanwyck's, and her character was referring to Henry Fonda's character. The film was a romantic comedy involving con artists.
Number 9 is from a 1940 Charlie Chaplin movie that poked fun at Hitler and the Nazis.
Number 12 is from an extremely funny 1944 movie called Arsenic and Old Lace. I gave you that one, it was too hard . . .