From idle to Attack and move left/right (Mecanim)

Hello everyone, i'm trying to add attack and move left/right while in idlestate, i wrote this to pass from idle to attack animation with no luck. I'm not a programmer and i'm learning opening scripts and studying the logic inside so any help is a big help for me.

Thats the code:

if (currentBaseState.nameHash == idleState)
{
if (Input.GetKeyDown(KeyCode.Mouse0))
{
anim.SetBool("AttackIdle", true);
}

else

{
anim.SetBool("AttackIdle", false);
}
}

and this is a animator's screenshot: