I was trying to get a sense of what it takes to do it. My friends are WELL AWARE that I am new at this and approached me because they like my work.
EVERYONE who shoots weddings etc has had a FIRST WEDDING. I would never do something if I thought it would turn out mediocre.
I don't know it all, but I know more than you. And I know that if you have to ask any of the above questions, you are no where near ready to shoot any of these events, nor accept payment for it. And if you aren't excepting payment for it, then why are you asking about pricing?
You'll need a camera that handles noise better than a D3000. You'll also need a few fast lenses such as a 50mm 1.8, a mid range 2.8 zoom, and a 70-200 2.8. You'll probably also need a few flashes and lightstands or brackets to hold them with. You'll need a backup camera body, just in case your's craps out in the middle of the ceremony, and likewise you'll need extra backup flashes in case something happens to your primaries. Backup batteries, backup memory cards, backup everything else.
After you have all your equipment, you'll need a contract between you and the wedding couple. Yeah they're friends, but friends have sued friends before because they thought they would get photographs of their special day at a 'deal', and then they didn't. Speaking of getting sued, how bout that million dollar liability policy for when the mother of the bride gets pissed because instead of getting the the brides expression at the vows, you got an underexposed shot of the light fixture behind her, or you drop your camera in the parkinglot and fry the memory card that was still in it - and did I mention that you can't 'redo' that moment again?
You know what I did when I shot my first wedding. I sat on a bench at the back of the church, next to the photographer, and watched the entire time. Didn't touch a camera the entire time. Couldn't tell you a single word the preacher said, but I could tell you every single movement the photographer made, and which pieces of equipment he used.