Answer:
What comes once in a minute, twice in a moment, but never in a thousand years?
You’ll have me at night and if you remove the first letter I denote the top, such as on a train
What is long and slim, works in light. Has but one eye, and an awful bite?
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
What is red and nailed to a wall?
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.