why my toyata comery isn't starting

Remove the top of the distributor cap. Have someone just barely turn the key so the engine turns for a second, as you watch the rotor. Did the rotor spin? If not, your timing belt has broken. If rotor turns, that's good. Belt is not broken. As for not starting while in park, it sounds like your neutral safety switch may be bad. But as always, first check all for your fuses.