All Mono channels should have “Balance Panner” and all Stereo channels should have “Combined Panner” as there default position 
I do think that you can set that in the Preferences.
No you can’t 
, if it’s possible then take a screenshot of it or give us instructions on how to do it then
Yes you can … Preferences > VST > make your choice in the top most box
If you don’t know something… ASK not state, is my advice.