Move WordPress blog site to new server

Hi, We have a WordPress based user tutorial fundtion. It's is working fine and we'd like to build a back up site using same set up. You will need to know how to reload mysql using dump from working site, replace domain name, etc, to make the site showing exactly SAME contents as the working site. The working site has some customization code using php and javascript, you need to know php/javascript well and be able to transfer these customization code to make it works with at the new site. Thanks