Well, I know of two ways to buy tickets. First you can buy online from http://www.motogp.com/en/Race+Tickets . Second, you can buy at the track on the day. I bought online for the 2008 MotoGP but when I got to the track, they were being sold a lot cheaper at the ticket booths. That year there weren't large queues. I heard for the 2009 MotoGP that queuing was pretty bad and the ticket printing system failed, leading to very a lengthy wait and delay. To be on the safe side, order online if you can. They are posted to you (FedEx) a few weeks before the race.
As for the Ducati functions, all I know is what's in my OP. Hopefully DucatiThailand will have some info as the date draws closer. I'll post anything as soon as I hear.