there are 2 totally diffrent systems in that year and you have to work out what you have firstly, there could be a dealer fit alarm/immobilzer. This is relatively easy to bypass/fix as it has nothning to do with the physical key. I can help with data on this system next is the smart key system. if you lose all the keys, you are stuffed as you cant get the transponder unit wrapped around the igniton lock barell, to talk to the ECU and allow the car to start. to fix this requires a new smart key to be coded into the ECU. According to Toyota this is not posbbile, and you have to buy a new ECU & jey combination, but i have had 1 such unit fixed by a very clever locksmith . Expect anything up to $1000 to solve this in either case, the Toyota key number is stamped on the inside of the drivers side door lock. you have to take it out of the door to read the 4 digit key. any good locksmith can cut a key with that code