Take a look here...nice little history write up..
http://www.mastercraft.com/teamtalk/showthread.php?t=29236
"The 1991-1994 MasterCraft ProStar 190 was 19’5” long, 85” wide, weighted about 2,450 lbs"
Can't help you with the trailer part though. I think a safe assumption would be 1k lbs. There might be a sticker towards the tongue that states this (if it's still legible).