How do I animate an 'enemy' NPC?

I've been creating a simple survival game, and have a basic AI scripted, but I now wish to apply this script to an actual animated model, rather than the capsule I'm using now. I'm a real beginner here, so if anyone can offer help, please understand that I know little about code, I'm just piecing bits together from what I've found!

The model I'm using is here on the asset store. I have imported the skeleton model into Unity, and seen that it has animations included on the import list, but I have no idea how to take this any further in terms of actually making it work with my AI.

I have also attached my current AI script below. If possible I would like to maintain the script behaviour as much as possible, but removing the colour changes and introducing the animated elements where appropriate.

 var Distance;
 var Target : Transform;
 var lookAtDistance = 25.0;
 var chaseRange = 15.0;
 var attackRange = 1.5;
 var moveSpeed = 5.0;
 var Damping = 6.0;
 var attackRepeatTime = 1;
 
 var Damage = 40;
 
 private var attackTime : float;
 
 var controller : CharacterController;
 var gravity : float = 20.0;
 private var MoveDirection : Vector3 = Vector3.zero;
 
 function Start ()
 {
     attackTime = Time.time;
 }
 
 function Update ()
 {
     Distance = Vector3.Distance(Target.position, transform.position);
     
     if (Distance < lookAtDistance)
     {
         lookAt();
     }
     
     if (Distance > lookAtDistance)
     {
         renderer.material.color = Color.green;
     }
     
     if (Distance < attackRange)
     {
         attack();
     }
     else if (Distance < chaseRange)
     {
         chase ();
     }
 }
 
 function lookAt ()
 {
     renderer.material.color = Color.yellow;
     var rotation = Quaternion.LookRotation(Target.position - transform.position);
     transform.rotation = Quaternion.Slerp(transform.rotation, rotation, Time.deltaTime * Damping);
 }
 
 function chase ()
 {
     renderer.material.color = Color.red;
     
     moveDirection = transform.forward;
     moveDirection *= moveSpeed;
     
     moveDirection.y -= gravity * Time.deltaTime;
     controller.Move(moveDirection * Time.deltaTime);
 }
 
 function attack ()
 {
     if (Time.time > attackTime)
     {
         Target.SendMessage("ApplyDamage", Damage);
         Debug.Log("The Enemy Has Attacked");
         attackTime = Time.time + attackRepeatTime;
     }
 }
 
 function ApplyDamage ()
 {
     chaseRange += 30;
     moveSpeed += 2;
     lookAtDistance += 40;
 }

Many thanks in advance for any help!