Writer's Block

When I finished my novel, here are the questions I needed answered, (and still need answered):

Should I edit it myself?
Should I hire a professional editor?
Which comes first the editor or the publisher?
Where do I find a publisher?

If I hire a professional editor, do I get one from the publisher? If not, where do you hire this person?

Can I do all this by telephone, e-mail, or postal mail; or do I need to meet with these people in person, face-to-face?

Do I need an agent? If yes, then where do I find one?
If I can't find an agent, then can I be my own agent?

What should I expect of an agent?
Do I pay anything up front?

What should I do to prepare my manuscript?
Should I do a first editing myself?
Should I make an outline and a sample chapter to send?

Do I need a lawyer?