Um...the guy isn't dead. Willis' character puts him in a choke hold, the 'sleeper' hold to be more precise. This hold cuts off the flow of blood to the brain, and can be fatal if you hold it correctly for too long. But if you hold the blood out of a human brain for 5-10 seconds and no longer, they pass out and remain unconscious without brain damage or death. Since the guy breathes afterwards, obviously he didn't cut off blood for too long.
it was the two parents who were dead. the man came back to finsh the job with the rest of the family. the father was on the stairs and the mother was dead on the heater.
You would be correct about the sleeper-hold, except when he starts to pass out, Bruce Willis breaks the guy's neck twice. If you listen closely, you can hear it.
Right, basically the two people who were dead were the man who we see get killed in the flashback, and the woman when she falls to the side after Bruce Willis unties her hands, why else do you think he looks at her like that?? Anyway, I can understand why you thought the guy should be dead, it did indeed look as if Bruce was breaking his neck three times during the battle, but obviously it was that sleeper thing.
I never noticed the guy in the orange suit breathing, but I did notice the father's body breathing and the mother helping Bruce untie her (well, not help, exactly, but she cooperated) despite the fact she was supposed to be dead.