I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

What is more useful when it is broken?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

Can you write down eight eights so that they add up to one thousand?