What happened when the wheel was invented?

What does this say?

XLR8

What do you answer even though it never asks you questions?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

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.

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

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?