can i split my va several times or just in half - left and right ? can i choose a style for the left hand and use the arranger and split the UPPER partin half
?

Yes you can. ITS ALL IN THE MANUAL...Read it.
I believe you can use 2 right hand splits which will give you 3 right hand zones.

It's ages since I had a VA76 but on that you could certainly split it.
As Graham rightly puts it'll tell you in the manual, or perhaps you could ring the music shop where you got it from (or if 2nd hand the previous owner) and ask them to go over it on the phone with you.