Hello.
What I have found out, that game has following content:
Train Simulator 2017 (Developers are always updating your current version to the newest, that's why you can't find TS2016 on steam any more) with add-on
• Train Simulator: Riviera Line in the Fifties: Exeter - Kingswear Route Add-On
• Train Simulator: Sherman Hill Route Add-On
• Train Simulator: West Rhine: Köln - Koblenz Route Add-On
• Train Simulator: The Pump Car Add-On
and following DLC
• Academy - UK, US And German Training Zones
• Castle Class (Double Chimmey)
• DB BR155
• Train Simulator: Union Pacific SD60M Loco Add On
• TS Rewards GWR Castle
• TS2016 User Interface Overlay
• UP Gas Turbine
• UP Insulated 50-foot RBL Plug Door Boxcar

Hope that you will enjoy the game, good luck!

PS. Thanks MaxQuake for figuring out the whole package.