You name your second page in this manner.
www.yoursite.com/secondpage and then publish it.
You create a lnk from your first page (either by using a menu bar or navigation bar, or just by hyperlinking the text). Where you enter the address of the second page you would type
http://www.yoursite.com/secondpage.html
Clicking on the hyperlink will bring up your second page. It is really easy.
I don't understand what you mean about temporary sites - you have to be using your real domain name to get this to work. All pages must be published in order for the links to work.