I have just downloaded foobar, and have searched everywhere on how to obtain a search bar (ie. like winamp has) and a volume control on the interface. Maybe I'm just blind or maybe I'm not searching hard enough, but does anyone know which or what plug-in or what I need to do to be able to have these things on my foobar? Any help is appreciated, thanks.

The seek bar is included by default just try to right click on the menu and use toolbars-> seekbar for the volume, you need to download UI columns:
http://music.morbo.org/ (and then, the same: right click, toolbars, volume)

If you are new, just know that there is a manual here::
http://eolindel.free.fr/foobar0.9/

Welcome to the foobar community

Thanks, I have the Columns ui and the volume. I'm still having trouble finding how to add a search bar on the interface though

You need a component called Quick Search Toolbar. Add it to your configuration through Columns UI's layout preset system.

Ahhh, thanks. I have it all working good.