Answer:
Face with a tree, skin like the sea. A great beast I am. Yet vermin frightens me.
What is the thing that stays the same size, but the more it's used the more it decreases?
I can be used to type and point you see. But don't forget, you can count on me. What am I?
I grow where no flower grows, where no light touches the walls, up or down, that I don't care, was here before people were.
My first is nothing but a name; my second is more small; my whole is of so little fame it has no name at all.
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?