Disable first person controller script, how?

 GameObject.Find("Player").GetComponent<FirstPersonController>().enabled = false;

You forgot the () at the end of the GetComponent()

GameObject.Find("Player").GetComponent().enabled = false;

Does not work in Unity 5, even if the scripts name is FirstPersonController. In unity 4 it would of worked. I can disable it manually, but not via script.

What if you just create a bool to disable the entire script?

 If(boolName == false){
 //do nothing
 }
 else {
 ...your code here
 }

Sorry about my earlier comment, I have not had the need to disable a script so I figured it would work the same and saw you were missing the ().

I've already created the bool, I want first person script to enable when its true and disable when its false. It is for the pause menu, I don't want the mouse to be looking around. In unity 5 its soooo different. In Unity 4 I disable the mouseLook, there is no mouse look script in Unity 5 to disable.