Using eight eights and addition only, can you make 1000?

For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

A journalist was investigating a sacred cult in the jungles of Africa when he was caught by one of the person. He was confined in a cave till the leader arrived. The leader told him that he need to tell him a statement. If he thinks the statement is true, then the journalist head will be chopped off. If he thinks that the statement is false, his head will be smashed with a hammer.

What statement did the journalist make to survive?

Can you tell a 3D object that has just two surfaces?

I don't get anymore wetter, no matter how much rain falls on me.

What Does this text mean:

important=important