The Sims-like movement script?

I need help making a script to make a character move around like in the sims. The one me and my programmer made just teleports the character to an unknown location. we are making a game called Reality, which is like The Sims. I would like it in C#.

Any Help?

edit: Here is the code:

---

using UnityEngine; using System.Collections;

public class ConstrainToTerrain : MonoBehaviour

{

bool canMove = false; public int speed = 5; RaycastHit hit; //Create an object to store all the raycast data Vector3 groundedHitPoint;

void Start() {}

void OnCollisionEnter () { if (Collision.gameObject.tag == "Terrain" ) { canMove = false; } //else //{ //canMove = true; //} }

void Update() { if(Input.GetMouseButton(1)) {
//create a new ray from the source point from the camera to the mouse position Ray ray = (Camera.main.ScreenPointToRay(Input.mousePosition));

      //ray is the origin and vector, and out hit is a vector, passing by reference so it needs out keyword
         if (Physics.Raycast(ray, out hit)) 
      {
             //Debug.Log("Hit: " + hit.transform.name);
           if (hit.transform.name == "Terrain")
              {
                Debug.DrawLine(Camera.main.transform.position, hit.point);
              }
       //have the cube turn to face the point

       groundedHitPoint = hit.point;
       groundedHitPoint.y = 1;
       transform.LookAt(groundedHitPoint);
       //Debug.Log("groundedhitpoint is : " + groundedHitPoint);
       canMove = true;
        }

    }
 if (canMove)
 {

    //this moves an object
    transform.Translate(Vector3.forward*Time.deltaTime*speed);
    //Debug.Log ("Vector3.forward is: " + Vector3.forward);
    //GameObject.FindWithTag("ScavengerSprite").transform.position.y.Equals(1000);

    float  distance = Vector3.Distance(transform.position, groundedHitPoint);
    if (distance <= 0.1F)
    {
      canMove = false;
    }
 }

} }`enter code here`