Answer:
What building has the most stories?
First I may be your servant's name; then your desires I may proclaim; And when your mortal life is over hold all your wealth within my power.
I do not contain flesh feather or scales; yet I have fingers and thumbs.
Light hides me and darkness kills me. What am I?
What bone has a sense of humor?
No matter how little or how much you use me, you change me every month.