What word is pronounced the same if you take away four of its five letters?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

I have eight fingers and two thumbs but I do not live. What Am I?

What will you call your mother's brother's brother-in-law?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

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