What Am I Riddles

Question: Given to all man then taken away, you can beg for more time but I never stay What am I?

Question: What has classes but moves?

Question: If you're looking for something sweet I know what to do.
But if you don't like heat I'm not for you.

What am I?

Question: I am a nice word composed of five letters, but the Romans would call me a numbers.

What am I?

Question: Look at my face, I am somebody. look at my back, i am nobody. What am I?