I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

How can you take 2 from 5 and leave 4?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Which point will the car reach to go out?

The more you take me, the more you leave me behind.
Who Am I?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

How many times can you subtract the number two from the number fifty?