var newObj = GameObject.Instantiate(somePrefabReference);
newObj.transform.parent = GameObject.Find("EmptyGameObject").transform;// Makes the camera follow this object by
// making it a child of this transform.
// Get the transform of the camera
var cameraTransform = Camera.main.transform;
// make it a child of the current object
cameraTransform.parent = transform;
// place it behind the current object
cameraTransform.localPosition = -Vector3.forward * 5;
// make it point towards the object
cameraTransform.LookAt(transform);