Take my first and make it my last now I happened in the past

Question: Take my first and make it my last, now I happened in the past.

What am I?

Question: Follower of man, Dark as night, A trained Choreographer, Comes after light.

Question: Everyone asks for me but yet everyone hates to face me ,for someone I am agony for others I am relief! Who am I?

Question: What tastes better than it smells?

Question: What goes in the water black and comes out red?

Question: What loses its head in the morning and gets it back at night?