Eight of us go fourth, not back, to protect our king from an attack. What are we?

With the help clues provided in the image, can you find the 5 digit key?

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?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I make two people out of one. What am I?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

If Japan and Panama decided to merge into a single country, probably people will name it Japanama.

Can you think of two more such country's unions that could produce similar names like Japanama by overlapping their three letters?