Tix are included in the cruise fare as well as bus transportation. No one has done this cruise recently -- last time Disney was sailing from NYC was 2012 and the first cruises this year will not be until October. Cruises from Galveston did some PC port calls but don't think those were recent either.
All aboard I believe is midnight for Port Canaveral. What time the last buses from WDW run I believe depend on which park you are leaving from and that parks closing time. (Last bus has to be before 10:30/11 or they wouldn't have time to make the drive before all aboard time). They give you the schedule that day.