Answer:
My teeth are sharp, my back is straight, to cut things up it is my fate.
Take off my skin, I won't cry, but you will.
What goes with a car, comes with a car, is no use to a car but a car cannot move without it?
I am the red tongue of the earth, that buries cities.
I have one, you have one. If you remove the first letter, a bit remains. If you remove the second, bit still remains. If you remove the third, it still remains.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?