Answer:
Brown I am and much admired. Many horses have I tried. Tire a horse and worry a man, tell me this riddle if you can. What am I?
What belongs to you but others use it more than you do?
I always follow you around, everywhere you go at night. I look very bright to people, but I can make the sun dark. What am I?
What is easy to get into but hard to get out of?
I am a fruit with seed on the outside.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.