It does not need to have a hyphen! :)
No
It's not a word in the dictionary, so yes, use the hyphen.
I do not believe that multitasking is supposed to have a hyphen.
You typically need only capitalize after sentence-ending punctuation, which a hyphen is not.
No, they do not work. You need to have the sugar crystals in the mint for it to work. Sugar free has no sugar so therefor it does not work. I tried to no avail.
no
No
No.
no
Yes, in-home does need a hyphen. It's two words put together to form a word for a different concept.
No. The word is "pinpoint".