Kansai Thru Pass covers non-JR trains, while Kansai Area Pass covers JR trains.
Which one is more convenient and save more money?
Can the pass used non-consecutively, i.e. Monday, Wednesday, Friday?

If travel less often, i.e. conference purpose at certain location, would one way ticket more economic?

If I wanted to go to Kobe from Kansai International Airport, I heard there's ferry services.
Is that included in any of the passes mentioned above (Kansai Thru Pass/Kansai Area Pass)?
And is it advisable to buy online here then go there to redeem?

Could I know how could I check train cost in Japan?
Just like our LRT online checking system.
I found JR one only.