wont start on 1996 Toyota Avalon

car wont turn over every thing has been replace altnater.,starter, battery, battery cable, wires ,

3 answers
Park neutral safety switch perhaps, factory security system problem? Once saw a Toyota towed in for a no start after it had been locked with the key fob and unlocked with just the key...it wouldn't start until it was unlocked with the key fob.
Have the ignition switch tested as power has to go through the ignition switch
try ignition switch lock cylinder, a b*tch to get off tho