Yes, but you need a capital at the beginning of a sentence.
I don't see why not although beginning a sentence with 'or' is unusual.
The correct phrase is "already" at the beginning of a sentence. For example, you would say, "Is it already time to go?" Using "already is" in the middle of a sentence is also correct, as in "It already is time to go." The placement depends on the sentence structure.
Yes, it is.
Yes it is correct to say the following sentence
depends..... and you could say with one hand
Yes, that is a grammatically correct sentence.
The sentence appears to have no meaning. So I would say it is not correct.
In most cases you would say you and I then again it depend on the question
No, the sentence needs a verb. The correct way: How does it look?
No, it would be correct to say: You admire her, or, You find her admirable.
Yes, the sentence is grammatically whole and correct.