how do I disarm a factory fitted alarm system and start my camry on 1995 Toyota Camry

without an override key. when I bought it two years back was on override coz they said the alarm was not functioning. now the alarm is armed after trying to start from been to an engine wash

Asked by for the 1995 Toyota Camry
Will the engine turn over? Does the alarm sound off when door is opened?
engine doesn't turn and the alarm does sound when the door is open
engine runs,alarm sounds with open door