Answer:
Mobsters judge the quality of a vehicle by the size of this
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
What stays on the ground but never gets dirty?
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it can neither see nor feel it. What is it?
Five hundred begins it, five hundred ends it. Five in the middle is seen. First of all figures, the first of all letters. Take up their stations between. Join all together, and then you will bring before you the name of an eminent king.
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?