Answer:
I am bought by the yard but worn by the foot. What am I?
I start with T end with T and within me is T.
No matter how little or how much you use me, you change me every month.
I have a brother. However much we run we do not reach each other.
My tail is long my coat is brown I like the country I like the town. I can live in a house or live in a shed And I come out to play when you are in bed.
For our ambrosia we were blessed, By Jupiter, with a sting of death. Though our might, to some is jest, We have quelled the dragon's breath. Who are we?