Your Toyota Camry 1998 lost origenal ignition key you have spare key but the car don't start its cranking only?

my car is toyota camry 1998 i lost the oreginal ignition key. i have a spare key but the car dont start only cranking. this car have a factory anti-theft security system. i consulted a mechanic and he said that the injector won't open and that this problem is connected to the computer box. my quetion is can i bypass the ignition key and how ?