Hello. I have a 1998 ES300 and I can confidently share with you that there is no security code necessary. I recently purchased a new battery for the car. It sat in the garage for a whole day without the battery. My worse nightmare was that I may need that mysterious CODE. No worries!!! You don't need it. Once I installed the new battery, the only thing I had to reset are my favorite radio stations and the clock. The concensus around i here is that the early model, before 1997 and 98, only needed that security code. There you have it. I hope this helps your mind at ease and for the others that may have this type of inquiry..
Cheers
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It has been said on these forums that the code is the last 3 digits of your vin #. ;)