Answer:
I help engines spin and pants stay up. What am I?
Sometimes I am white, sometimes I am dark. Most people love me. What am I?
I am enjoyed by some despised by others. Some take me for granted some treasure me like a gift. I last forever unless you break me first.
What has a head and a tail, but no body or legs?
I have two bodies joined together as one. When standing still I run and run.
I am your mother's brother's only brother in law. Who am I?