Answer:
I'm sometimes white but most often I'm black. I take you there but never bring you back.
There's a one-story house in which everything is green. Green walls green windows green doors. What color are the stairs?
I come off of a beautiful creature which soars in the sky. I come off of a peckish creature which has a tail as mighty as the sun! I am sometimes dirty and parents beg you not to pick me up.
I am needed for most animals and hardcover books
Of these things - I have two. One for me - and one for you. And when you ask about the price I simply smile and nod twice.
A little house full of meat, no door to go in and eat.