Yes, CtP2 contains all the unused C:CtP sprites as well, as well as some (two?) that are new for CtP2, but unused. The scenario-specific sprites should be in the relevant scenario directories
From the top, then from left to right:
Fascist (CtP1)
War Walker (CtP1)
Corporate Branch (CtP1)
Combat Engineer/Minesweeper (CtP1: unused)
Televangelist (CtP1)
Eco-Ranger/Park Ranger (CtP1)
Paratrooper Delivery Plane (CtP1)
In C:CtP, the paratrooper worked like in Civ2, it could drop out to a location, and was delivered by this plane.
Check out
this thread for a list of units used in the MedPack, and some spares. Note, many new sprites have been completed/released since this list was 'finalised', so cannot be taken as complete, but gives a good idea, and includes all the CtP1 and 2 sprites, all of Tom Davies brilliant units, and the rest of the MedPack/Cradles ones, I think.