Answer:
I am a box which holds keys but not locks. With the right combination, I may unlock your soul. What am I?
The more you take away from me, the bigger I shall get. What am I?
I am the thing that is used to make your weight. What am I?
I am a five letter word. If you remove my first letter I am a form of energy. Remove my first two and I am needed to live. Scramble the last three and you can drink me. What am I?
What can fill a room but takes up no space?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.