Boost is a set of libraries required to compile the Trinitycore project, its a dependency, nothing needs to be run once you have it - the libraries are portable by nature, they come precompiled and just "exist", nothing to run.
Provided you have the correct files (you do) in the location specified in the guide (can't tell from your screenshot), and have set the BOOST_ROOT environment variable as shown in the guide, you can safely move on without issue - there are instructions in the Trinitycore source that will automatically tell CMake where to look for, and what to do with, the boost files once you get to that step in the installation - you don't need to worry about them so long as they exist on your system and you have followed the guide.
At this point (the requirements step), all you need to do is follow the steps and make sure you have each of the programs and files on your computer - you don't need to worry about doing anything with the files or programs once they're properly installed, just make sure you have them - later on in the guide you'll be told what to do with them.