What does this rebus puzzle means ?

1. Where does Easter come from before Valentine's Day?

2. Do you know what is in the middle of Valentine's?

3. What did the lady bee say to the man bee on the occasion of Valentine's Day

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

It belongs to you, but other people use it more than you do. What is it?

John was drowned by he was not wet. How?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?