"to total (a car)" = to totally wreck (a car). "Almost brand-new" means the car had been driven for a while (ie. a few days/weeks) before the accident. It was pretty much brand-new; just used a little.

total a car = to make a total wreck of a car You do know that for single words like this you can use a dictionary?

Totaled means achieve. And brand new is a brand what recent come out from the factory. Maybe it's better if prefer to select this sentence :"I have interested an almost brand-new Toyota Camry.

Totaled means the car was damaged beyond repair. Yes "almost brand new" does mean "used car like a new one"