What am I riddles

I have four legs and a long tail. I eat oats and hay. I love to run fast. I let people ride on my back. I am a...

A slender body, a tiny eye, no matter what happens, I never cry. What am I?

Take me for a spin and I'll make you cool, but use me in the winter and you're fool. What am I?

Never ahead, ever behind, yet flying swiftly past; for a child, I last forever; for an adult, I'm gone too fast. What am I?

Armored but not a knight, snapping but not a twig, and always at home, even on the move. What am I?

For thousands of years, Seen only in tale. The wind as a sail, For one thunderous gale. Shiny stores rich in lore, The burning temper, like Earth's core. What am I?

Never was, I am always to be. No one ever saw me, nor ever will. And yet I am the confidence of all, to live and breathe on this terrestrial ball. What am I?

Take away my first letter, and I still sound the same. Take away my last letter, I still sound the same. Even take away my letter in the middle, I will still sound the same. I am a five letter word. What am I?

I do not eat food. But I do enjoy a light meal every day. What am I?

A container without hinges, lock or a key, yet a golden treasure lies inside me. What am I?