Answer for How to Disable or Enable a layer of animator controler?

 // Use this in the start of the class: "       Animator animator;        " 
 // just add this
 // the arguement is asking which layer 
 currWeight = animator.GetLayerWeight(1);
 
 if (Input.GetKey(KeyCode.Mouse0))
         {
             // Use this in the start of the class: "       Animator animator;        " 
             // the first arguement is for the layer they are asking which the number of the layer
             // the second arguement is asking the weight of the layer 
             animator.SetLayerWeight(1, 1);
         }
 
 if (!Input.GetKey(KeyCode.Mouse0))
         {
             // the first arguement is for the layer they are asking which the number of the layer
             // the second arguement is asking the weight of the layer 
             animator.SetLayerWeight(1, 0);
         }