WPyogi on "one click install hosting? what does my laptop need?"

No, you don't need anything on your computer - it's all done through your browser. DH One-click works fine, yes - it's quite easy to use. You should, however, set up FTP access to your site as you'll likely need it for various things - see:

http://codex.wordpress.org/FTP_Clients

To install a purchased theme, see:

http://codex.wordpress.org/Using_Themes#Adding_New_Themes

There's also lots of good info here as well:

http://codex.wordpress.org/WordPress_Lessons