Guitar/Mic questions...

[nouserpif]

Hey, I got a guitar a while ago, and I have been playin, and now, I need a mic. So, I have a few hardware q's about mics...

Can they be plugged into the regular input jack of my amp (2 input jacks)?

If yes, if it is in the same amp as my guitar, while playing heavily distorted, would that screw up the mic?

Should I buy a seperate amp for my mic?

Does it need a special jack or other stuff?

Any other info that would help a moron? Lol!
Dan Conner