Answer:
I am known for my natural tuxedo and marching
I have keys but no locks. I have space but no room. You can enter but can't go outside. What am I?
The more of me you take, the more I appear behind you. What am I?
found at the back of the book.
My rings are not worth much, but they do tell my age. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.