Learn about what webhosting is.  Link to wiki.

 

A wiki classified list of web hosts.  The hosting market shifts often, so shop around for the lowest price for the features you need first.  To run most open source web applications your host should have php and mysql installed.  Link to wiki classifieds.  

 

You will also need to purchase a domain name.  Many hosts will offer domain name registration.  Again, shop around.  Ipowerweb.com currently offers domain registration for US$3 a year.   Link to wiki.