Answer:
I am filled with garb the price is free. Just return what you don't need.
I am the tool for inspiring many. Buy me in the store for not much more than a penny. Don't overuse me, or my usefulness will go. What am I?
I am a path between high natural masses; remove the first letter to get a path between man-made masses.
In a tunnel of darkness lies a beast or iron. It can only attack when pulled back. What is it?
My days are numbered.
Why was the cook arrested?