Answer:
First I may be your servant's name. Then your desires I may proclaim. When your mortal life is over, I hold all your wealth within my power. What am I?
I make a living following the wealthy and beautiful.
I hide but my head is outside. What am I?
I make a loud sound when I'm changing. When I do change I get bigger but weigh less. What am I?
What has a thumb and four fingers but is not alive?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.