How can I use just one script to move randomly several characters from an array?

Hi guys!.. I have trying for a couple of days to do that, but now I'm stuck.

I have a List of Characters. After several time, I want to select one randomly and I give it the animation "walk" until the character arrive to a point. When the character arrives to the point, it needs to stay there for a while and then, after several seconds, it needs to turn around (eulerAngles(0, 180, 0)) and walk back until a point and them I need to destroy that character and select a new one from the list and do the same thing!

This is the script I have so far:

using UnityEngine; using System.Collections; using System.Collections.Generic;

public class Please : MonoBehaviour { public List CharacterList = new List(); public Vector3 Target = new Vector3(-18.03273f, 0.09936082f, 1.479195f); float speed = 3f; public GameObject characterChosen;

 bool doIt = true;
 void Start ()
 {
     ChooseCharacter();
 }
 
 
 void Update ()
 {
     Invoke ("Move", 5);
 }
 
 void Move(){
     if (characterChosen.transform.position.z <= 1.910322) { 
             characterChosen.transform.animation.CrossFade ("walk");
             characterChosen.transform.Translate (Vector3.forward * Time.deltaTime * speed);
         }
         else {
             characterChosen.transform.animation.CrossFade("idle1");
             Invoke("GoBack", 10);
             StartCoroutine (MoveRest());
         }
 }
 IEnumerator MoveRest(){
 yield return new WaitForSeconds(10);
     if (doIt == true) {//This is for avoid that ChooseCharacter is selected several times
         doIt = false;
         ChooseCharacter();
     }        
     if (characterChosen.transform.position.z <= 1.910322) {
         characterChosen.transform.animation.CrossFade ("walk");
         characterChosen.transform.Translate (Vector3.forward * Time.deltaTime * speed);
     }
     else {
         characterChosen.transform.animation.CrossFade("idle1");
         Invoke("GoBack", 5);
     }
 }
 void GoBack(){
     if (characterChosen.transform.position.z >= -37.63817) {
         characterChosen.transform.eulerAngles = new Vector3(0,180,0);
         characterChosen.transform.animation.CrossFade ("walk");
         characterChosen.transform.Translate  (Vector3.forward * Time.deltaTime * speed);
     }    
 }
 
 void ChooseCharacter(){
     if (CharacterList.Count >= 1) {
         int characterIndex = Random.Range (0, CharacterList.Count);
         characterChosen = CharacterList[characterIndex];
         CharacterList.RemoveAt (characterIndex);
     }    
 }

} Please, I really need your help! So, How can I use this script to select the characters from a random List and do what I wrote below above?

Thanks so much in advance!