Answer:
What is black when you buy it red when you use it and gray when you throw it away?
What belongs to you but others use it more than you do?
Everyone asks for me but yet everyone hates to face me. For someone I am agony for others I am relief. Who am I?
I describe a toilet cleaner as well as one of Santa's reindeer
I stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
A little house full of meat, no door to go in and eat.