Sounds like you have a master so you can now can buy another key get it cut ( I prefer to use a locksmith instead of places like homedepot) then use techstream to program the immobilizer and door locks. You can use the excellent tutorial written by JuneBug at the beginning of this thread,Confirmed it's a master - it opens the glove box and does shut off the security light if I press and hold the key into the ignition without turning. If I don't press and hold, the security light comes back on. Go figure.
Thanks for the help!
Here's a link to the techstream cable on ebay
Mini VCI Diagnostic Tool Cable Scanner for Toyota Lexus TIS Techstream V10.30.29
Here's a little video on some things that can be done with techstream. Depending on model.