targets.cs

Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;

float rayRange = 100f;
void Update () {
  if (Input.GetMouseButtonDown(0)) {
    if(Physics.Raycast(ray,out hit)) {
        Vector3 targetPos = hit.point;
        Debug.Log(targetPos);
        Targets [count].transform.position = targetPos;
        Targets [count].GetComponent<MeshRenderer> ().enabled = true;
        tList.Add (Targets [count]);
        target = tList [0].transform;
        agent.SetDestination(target.position);
        count += 1;
    }
  }
}