Answer:
I am one with eight to spare, lest I lose my one. I'm not a number. What am I?
I am partially baked. I am not completely lit. I am a portion of the moon. I am lesser than full wit. I am a divider of the hour. I am not a total lie. I am a sibling through one parent.
I have two bodies joined together as one. When standing still I run and run.
I look at you, you look at me. I raise my right, you raise your left. What am I?
I never sleep yet sometimes I weep. I can get angry or just be happy. Wherever you go, I will follow. No matter what you do, I will be there. I cannot die. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.