1. That's a horse of a different colour.
2. missing the point OR It is pointless OR there is no point
3. Alfred Nobel
4. Penalty box
5. In formation (an "n" formation)
6. "The Last of the Mohicans" OR Chingachgook
7. Baloney ("BA" plus a lone "E")
8. That's the icing on the cake.
9. A fool and his money are soon parted.
10. book ends
11. Laughing Hyenas
12. Puss in Boots