How to play music and sound / get working radio

I am pretty noob at Unity. I am trying to make working radio and making it possibly the hardest way, but it's learning experience to me.

So I have that RadioStation changes when you click it under MaxDistance and it works but now I want to make music and changing channel button sound to play. Code to player

 #pragma strict
 
 var RadioChange : int = 1;
 var Distance : float;
 var MaxDistance : float = 3;
 
 function Update ()
 {
     if (Input.GetButtonDown("Fire1"))
     {    
         var hit : RaycastHit;
         if (Physics.Raycast (transform.position, transform.TransformDirection(Vector3.forward), hit))
         {
             Distance = hit.distance;
             if (Distance < MaxDistance)
             {
                 hit.transform.SendMessage("ApplyStationChange", RadioChange, SendMessageOptions.DontRequireReceiver);
             }
         }
     }
 }

Code on radio

 #pragma strict
 
 var RadioStation = 10;
 
 function Update () 
 {
     if(RadioStation <= 0)
     {
         RadioStation = 10;
     }
 }
 
 function ApplyStationChange (RadioChange : int)
 {
     RadioStation -= RadioChange;
 }

RadioStation 10 is when radio is off and I want button click ofc to be first one and after that music, not same time.

So I would be thankful if you could help me in this. :)