Hi there.  Welcome to the Toolkit mod.  Please read all of the documentation that comes with this mod- every XML script has an accompanying file with it, explaining what it's doing, and why.  

Some of these files can be removed without doing any harm to the codebase- you'll see the following note at the bottom of their documentation:  "This script can be removed without doing any harm.".  If a script does NOT say that... then removing it is likely to cause problems- just warning you now!  Other than the script-specific documentation, there are a lot of other documents in here, talking about everything from the specific game-design decision-making process I used here to issues of XML coding practices, etc., etc.

You don't have to read them all, but if you're just getting started with FL modding, you probably should :-)