Help me, I'm a complete idiot!, where do sounds come from? Do they have a mummy and a daddy? Options

[ash]

Hi again all.
Since there doesn't seem to be any oms patches for the ill-fated Technics WSA-1 keyboard, can anyone tell me how to get more sounds into cubase.
How do you normally do it. I don't have a clue!
Can I get sounds off the web?
Can I sample real sounds?
Can I ........ I just want more sounds to choose from, and i don't know what to do.
I don't care if they're virtual synths, or sounds that load onto the keyboard - like GM patches or something. i just need to know what people do.
For example; I need to make the perfect drum-kit: how do i do it?
can i use a browser to find wav files and edit them and then trigger in cubase with my synth - you know; up and down the scale? cos I'd really like to.

reagrds,

Ash