I really need to look up this kind of self employment stuff - I'd love to start a business and make my own money, beating the whole working for somebody else thing before I even properly start. But at 18 I'd have no idea what I was doing 

I'm not keen on "Any business is much appreciated!"
It may be honest, but sounds a bit desperate!
If your going for that personal touch, then "No job too small" or something to that effect might be better , if thats not too cliche.
You've let the Mac build a website utility thing put your @me.com email address into your contact page
Ohhh didn't see that cheers.
EDIT: One of my mates does freelance website design so he's going to do a website for me when he has time, I just wanted to get email/domain sorted out first.
Yeah, it's and important thing to have right as it will make a big impression on your customers.
If you're not a web designer or artistic it is hard to get right though. I know a lot of start ups can find it hard to spend money on.
Good luck with the venture
Perhaps put a picture up of the red Mini with the stickers on it - it portrays a quirky / friendly / fun image.