Answer:
I come with a train and go with a train and the train doesn't need me but can't go without me.
I have long legs crooked thighs little head and no eyes.
Squeeze me and I cry tears as red as my flesh but my heart is made of stone.
I am round. I have only one line. Circle is not my name indeed. What am I?
I am needed for most animals and hardcover books
A little house full of meat, no door to go in and eat.