For Designing a site you must know html language.

Graphics design you can use photoshop,flash

HTML Tutorial

You can use google search for findout more details

A web hosting service is a type of Internet hosting service that allows individuals and organizations to provide their own website accessible via the World Wide Web.

Web hosts are companies that provide space on a server they own for use by their clients as well as providing Internet connectivity, typically in a data center.


Refer for more details Web hosting service - Wikipedia, the free encyclopedia