I've still not got around to using th equick controls.
If you aren't sure what
the CC numbers are then set Cubase to record and then tweak each knob. Open the edit
window of th eMIDI track you have recorded, got to the bottom left and find the action
that says "Display used controllers" (or words to that effect). The edit window will then
show the various lanes that have been recorded.http://tweakheadz.com/midi_controllers.htm
Have a read of this page.
That should help you get a better idea of what CCs are and how you might use them.
Q2 - Adding an LFO - What are you wanting to achieve? The Line 6 KB doesn't
produce any sounds (AFAIK) so I presume you wish to add it to a recorded sound or synth?
Cubase has a few plug ins which can affect audio using an LFO, such as the tremelo or
flanger/phasers. You should also have some form of filter, such as Tonic which allows
synced (or free running LFO) filtering.
Q3 - Assigning a sample is usually
done using a sampler programme. Cubase has a drum machine in it and this provides some
tips on how to use it.http://www.soundonsound.com/sos/dec09/articles/cubasetech_1209.htm
There are other sample playback VSTs available such as Kontakt as well.