A very newbie question about Postbit and the like..

[nadesuko]

Hello I am brand spanking new to the vBulletin system of templating and styles, and after viewing some of this forum I am even more confused.
::asks incredibly dumb but necesarry questions::

What is postbit?

What is the difference between a style and a template? Is a style a CSS document for colours and a template for layout of imagery, tables, etc?

How do I implement created templates and styles to my forum?

::ends stupid newbie questions::
Although I am experienced in graphic design, web design and contemporary art, I am not by any means a coder, but I am willing to tackle vBulletin. Any help or links would be greatly appreciated in my mystical quest towards a decent looking vB board ^_^

::just to let you know, the DNS servers for our website are being relocated, so they won't be switched over for a couple weeks, which is a big woe, but oh well for now ^_^::

Thanks