Where can I get a good template for my Art Site?
I've had a quick look around and I would like a suitable one for my art gallery listed in my signature.
Thanks heaps.

for free? or paid. I would recommend hiring someone...

For free please.

Zymic has many nice templates.

Are there any tutorial to show me how to use a template?
I have no idea how to use a template and can't find any 'how to's' on the net
Is a template only for the home page?

the home page is the index.html, usually what people do is COPY PASTE the index.html (home page) and rename it to for example about.html and change the content INSIDE. Basicaly you copy paste the pages as many as you want and rename it.
Once done you need to change the LINKS into your pages (navigation) so when they clic about it goes to the about.html.

Pretty simple to do when you know a little bit. But you can ask for help in the correct area of the forums, you'll probably get 100 answers since its the basics and pretty much lot of people know how to do it.
Don't forget to put the name/number of the template so they know where to look at !