Fun Riddles

Question: The first is a sign of something good,
the second says whereto;
the third is vulgar and mean,
the fourth is bound by a ring;
the fifth is the noble one.
Together they all drum.

What are they?

Question: Why don't mountains catch colds?

Question: When do you go at red, but stop at green?

Question: There was once three trees. The first tree did whatever the third tree did, and the third tree did what ever the second one does. What happens if tree number two gets cut down?

Question: I can run but never walk. Wherever I go, thought are close behind me.

What am I?