Where do i find bassion or bastion .. forgot his name..
You find Basso in the small house right at the starting position. He's locked himself in there, so you need to give him a notice that everything is ready by using the whistle in front of the house's window.
Where are the last 20 loot?
I presume you are playing the patched version 1.18. There is a bug concerning the loot in this mission. Where you found the two scattered coins, should be also a third one. This item got stuck in the wall, when LGlass renovated the building for the patch, though. Because it is stuck in the wall (in a solid brush), you can't grab it no longer.
For other questions about the loot in this mission, check out my loot list.