You shouldn't use vcpkg for TFS 1.2 because it was released on 2016.
A free and open-source MMORPG server emulator written in C++ - otland/forgottenserver
github.com
Please take a look at Github and follow the correct tutorial for TFS 1.2
A free and open-source MMORPG server emulator written in C++ - otland/forgottenserver
github.com
Note: Up until TFS 1.2 OR in master branch until 2017-12-31 you need the following instead:
Visual Studio 2015 Community (compiler)
Boost C++ libraries for MSVC 14.0 (
32-bit download,
64-bit download)