Click to move C# with animations and sounds

HI, I'm making a little fantasy game in which tha player moves around on a plane (ground) targeted by a clik (right click). I used the script of Unify Community "Click to Move C#". My problem is that the model has legacy animations, so when i set the animation start to "idle" and when i insert in:

             if (destinationDistance < .5f) {
                 moveSpeed = 0;
 
             } else if (destinationDistance > .5f) {
                 moveSpeed = 3;
             }

the call to the aniamation with:

 GetComponentInChilldren <Animation> ().CrossFade ("idle");

 GetComponentInChilldren <Animation> ().CrossFade ("walk");

respectively in the first and in the second if statement all is ok but i have other two animation that don't play: "attack_combo " and "death". I'va tried to add those lines to the script to make the attack function:

 if (Input.GetMouseButton (0)) {
 Attack ();
 GetComponentInChildren <Animation> ().Play ("attack_combo");
 }
 

But the attack animation don't play.. I've tried GetMouseButtonDown and GetMouseButtonUp... With one of these animation plays only if i keep pressed the button... Finally I have some clips to play like footsteps and attack sfx. I use a SoundManager like the o ne on the Unity tutorial, but with the line of code:

 SoundManager.instance.PlaySingle (footstepsSfx);

placed in the destinationDIstance if statement the, sound play and loops after the translation is finished. And the line:

 SoundManager.instance.PlaySingle(attackSfx);

placed in the Input.GetButton (0) don't make any sound... Any idea?