Chateau Sleepers are Stainless Steel and originally built for Canadian Pacific's
The Canadian in 1955. VIA completely rebuilt them in the late '80s early '90s.
Renaissance Sleepers were built for British Rail in the mid 1990s to run through the Channel Tunnel. That train never ran and VIA acquired them in 2000. These are in the green paint scheme and this is the type of sleeper you were in in 2016.
That's not a baggage car attached to the Park Car. It's called a Transition Car {but uses a baggage car former sleeper shell). It has a European style coupler on one end and a North American coupler on the rear so a Park Car can be attached. The interior of the car has wall displays and flags of the provinces as well a freezer and storage units.
You can find all VIA car types here (scroll down in the link and click on each)
Train fleet - Rolling stock | VIA Rail