Answers: It's the Great Pumpkin, Charlie Brown

[liljoeyboy]

1. 1

2. He rolls it.

3. tricks or treats

4. It must be sincere.

5. rocks

6. Pigpen

7. witch

8. WWI

9. presents

10. pumpkin carving

11. bobbing for apples

12. the Red Baron

13. She threatened to sue him for making her miss tricks or treats.

14. Snoopy

15. She gave him a signed document saying that she would not pull the football away.

BONUS:
Woodstock. Also acceptable: Peppermint Patty or Marcie.