2. First thought is Bush, but I don't think he was a colonel. I'm leaning towards Castro, so that's my answer.
3. Mountains in Pennsylvania...mountain lions in Pennsylvania mountains...I got nothing.
4. Venice. I'm hoping acqua is Italian for water and alta means high or rising.
5. Triangle guy -- Pythagoras.
6. Is "as a stab" a clue? Nothing on this one.
7. First guess is something to do with a character playing with dolls. Second guess is something about origami.