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 is easy to get into, but hard to get out of?
I need to be taken before you can have me. What am I?
I build bridges of silver and crowns of gold. What am I?
What can be as big as an elephant but weighs nothing?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?