Compiler error

Hello i'm making a third person Top Down shooter game. i started my Player Controller script to change the controls to WASD and Mouse and recieved some errors. Can an experienced person please look at my script i will leave the compiler errors also. Thanks

[1]: /storage/temp/79799-prob.png

using UnityEngine; using System.Collections; using System;

[RequireComponent(typeof(CharacterController))] public class PlayerController : MonoBehaviour {

 public float rotationSpeed = 450;
 public float walkSpeed = 5;
 public float runSpeed = 8;

 // System
 private Quaternion targetRotation;

 // Components 
 private CharacterController controller;
 private Camera cam;

 void Start() {
     controller = GetComponent<CharacterController>();
     cam = Camera.main;
 }

 void Update() {
     ControlMouse();
     //ControlWASD();
 }

 void ControlMouse() {

     Vector3 mousePos = Input.mousePosition;
     mousePos = cam.ScreenToWorldPoint(new Vector3(mousePos.x, mousePos.y, cam.transform.position.y - transform.position.y));
     targetRotation = Quaternion.LookRotation(mousePos);
     transform.eulerAngles = Vector3.up * Mathf.MoveTowardsAngle(transform.eulerAngles.y, targetRotation.eulerAngles.y, rotationSpeed * Time.deltaTime);

     Vector3 input = new Vector3(Input.GetAxisRaw("Horizontal"), 0, Input.GetAxisRaw("Vertical"));
     Vector3 motion = input;
     motion *= (Mathf.Abs(input.x) == 1 && Mathf.Abs(input.z) == 1) ? .7f : 1;
     motion *= (Input.GetButton("Run")) ? runSpeed : walkSpeed;
     motion += Vector3.up * -8;

     controller.Move(motion * Time.deltaTime);

 }

 void ControlWASD() {

 }
 Vector3 input = new Vector3(Input.GetAxisRaw("Horizontal"), 0, Input.GetAxisRaw("Vertical"));
  
    if (Input != Vector3.zero) }
         targetRotation = Quaternion.LookRotation(Input);
         transform.eulerAngles = Vector3.up * Mathf.MoveTowardsAngle(transform.eulerAngles.y,targetRotation.eulerAngles.y,rotationSpeed * Time.deltaTime);
    {

     Vector3 motion = input;
     motion *= (Mathf.Abs(input.x) == 1 && Mathf.Abs(input.z) == 1)?.7f:1;
     motion *= (Input.GetButton("Run"))?runSpeed:walkSpeed; 
     motion += Vector3.up* -8;

     controller.Move(motion* Time.deltaTime);

{