Separate version. (TC1 is a waist of money. TC2 is very good if you are into trams & TC3 is worth every cent)... Note; TC 1 & 2 come bundled together.
Consider getting S&C (updated TC3). It will run as a stand-a-lone or can be added to TS2009 (& I assume TS2010)... S&C is designed to run in "Native Mode" in TS2009. (approx 800+ TC3 contents has been updates so they can now run in TS2009 "Native Mode")...
As a stand-a-lone you only get "Driver & RailYard". You have to install S&C into TS2009 (& or TS2010) if you want "Surveyor" !!!! Check the forum first to make sure S&C installs & runs problem free in TS2010. (I haven't tried that yet)...
Cheers, Mac...