Hey xMeddler,
That first part is a custom function called Init Mouse. That was a very basic system I made ages ago. I just recently got a headset and plan to start making RPG components that can be added to actors and will explain them on youtube once I find a decent software program to use and the time to do it.
If you have any other questions regarding the basics of that system feel free to ask. I can easily create it in 4.9 again as well and send it to you if you’d like.
Cheers,
Haka