What does this rebus puzzle means ?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

John and Jill are madly in love with each other. To remind Jill of his pure love, John wants to send her a ring by post but in their country where burglary is quite prominent, any package that is not locked comes under the risk of being stolen for the contents.

John and Jill possess many padlocks but neither one of them has the other key.

Can you find a way John can send the ring to Jill safely?

What can you catch but never throw?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

How many sides does a circle have?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

What is common among 11, 69, and 88?