hey there.
you cannot generate sounds by simply adding empty audio tracks to your project. creating audio tracks has to do with recording sounds from out of cubase, editing samples, etc.
since you want to produce hip hop, you'll deal with audio samples a lot. you should try looking for loops online. try these websites:
http://www.freeloops.com
http://www.loopit.org/
and if you want to create sounds with cubase's vsts, first you have to create a midi track on your project. then choose a vst instrument and link the midi track to it.
you can do that by selecting on the vsts window the instrument you want to use. then select it again on the "out" options that appear on the track's menu.
then, highlight the ammount of bars you want the new sound to have, left-click them twice, and voila: there's a writable rectangle. double click it too. the midi piano will lead you from now on.
sorry if i wasn't very clear, it's just that english is not my first language (as you may have noticed).
newbies rule, let's keep trying.
