Answer:
Born in the ocean and white as snow. When I fall back to water, I disappear without a trace. What am I?
Used left or right I get to travel over cobblestone or gravel. Used up I vie for sweet success used down I cause men great duress.
I start with T end with T and within me is T.
They are many and one, they wave and they drum, used to cover a stare, they go with you everywhere.
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.