Answer:
I start with T end with T and within me is T.
What is made of wood, but can't be sawed?
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
I am a type of animal that hang out in the mist
I am constantly overlooked by everyone but everyone has me.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.