I think the most important thing is to not look unhealthy (unable to take care of yourself) or extremely nervous. After that people are a lot more accepting, it'll still have an influence though. You might be able to disregard people who don't like you as people you wouldn't be friends with, but it matters professionally too.
Sort of, yes. It may well be the first attraction. After that character is all important.
They do if your looking inside as well as outside.
To an extent. You have to be attracted to someone for things to work. Some people were not attracted to their love ones at first but eventually it happened.
Not at all
Yes, they do.<br />
Not that people need to meet the stereotypical expectation of good looks, but you need to find your partner attractive in your own eyes.
that is general - yes, they matter
No, I don't.
if they didn't, I would be a lot more popular, get a lot more action, and be much better employed. I'm a great guy but quite ugly.