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.
When it comes to me, you go on red and stops on green. What am I?
I am easy to waste and unstoppable
I know a word of letters three. Add two and fewer there will be. What is the word?
I contain five little items of an everyday sort. You can find all five in a tennis court.
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk