As a huuuuuge disney fan, I can answer these
1. They make shoes since it was Mamá Imelda Rivera's specialty and became a family tradition
2. When Hector left to play music to the world
3. She hates it, since it tore the family apart
4. Dante is a street dog that Miguel grew attached to
5. A gigantic bell fell on him during a performance
6. They will be forgotten, then disappear to the land of the forgotten
7. In the Land Of The Dead
8. Papa
9. By accepting a blessing from a family member
10. He gets facepaint and makes Miquel look like a skeleton
11. Hector did
12. Reveals that she loved music, but since Hector left, she didn't like it anymore
13. Ernesto De La Cruz
14. Ernesto poisoned Hector's drink since he wanted to return to his family