How To Stop Player Completely?

EDIT: If you look at the script posted on here, it's been changed. I got rid of transform.Translate (speed * Time.deltaTime, 0f, 0f); and replaced it with speed = 0; Now the Player finally stops in his tracks, but now I need to know how to turn on is kinematic from the script. So if anyone knows how to do that, do tell. That's probably all I need, so you don't need to read the rest of this.

Hello everyone. I've been testing out something on Unity, and this one thing is stopping me from continuing. You see when I grab a certain gameobject, it disables my Player Movement and Gravity. What I'm trying to, is stop the Player completely when in air. So far when I jump and collide with the gameobject, the Player continues to go up thanks to there being no gravity and well you know how things work. So what can I do to stop the Player completely when he jumps and collides with a certain gameobject? I've tried Time.timeScale = 0; so many times now, so it does not work for me.

Here's part of my script so far WARNING messy code because it's a test:

 bool isPaused = false;
 public float speed = 5f;
 public float jumpForce = 700f;
 
 void OnTriggerEnter2D(Collider2D coll)
     {
                 
                 if (coll.gameObject.tag == "Item") {
                                 speed = 0;
                                 this.rigidbody2D.gravityScale = 0.0f;
                         StartCoroutine (WaitGravity ());
                         if (isPaused)
                         rigidbody2D.AddForce (new Vector2 (0, jumpForce));
                         StartCoroutine (WaitJump ());
                       
                 }
 }
 
     IEnumerator WaitGravity()
     {
         yield return new WaitForSeconds (4.0f);
         this.rigidbody2D.gravityScale = 2.0f;
         }
     IEnumerator WaitJump()
     {
         yield return new WaitForSeconds (4.0f);
         rigidbody2D.AddForce (new Vector2 (0, jumpForce));
         }

Here's the rest: http://pastebin.com/hXLR94WJ and http://pastebin.com/H7Fi9eb1 If you can help, please do so.