car won't start then with a message "parking brake not available" on 2007 Lexus LS460

First time having this kind of problem. My car was just completely unresponsive. At first it wouldn't start and orange triangle light was blinking with a message "parking brake is not available." I turned off everything and got out of the car to wait a few minutes. Then I was locked out, I couldn't open my car with the smart key. I had to manually open it. What seems to be the problem? I'm having it towed to the dealer.

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2 answers 1 comment
I am having the exact same problem with my 2010 Lexus LS 460 L. Car totally unresponsive. Probably start switch issue
In my case the battery was in process of dying and that was what caused the confusing signals on the dashboard - including one that said "take to dealer at once". When my battery finally died I got no signals on my dashboard. However, the towing company I called was very astute and advised me that I probably just had a dead battery & jumped my car enough for me to drive to Sears and buy a new battery. The problem was 100% fixed with new battery.
I am having the same problem - August 2014. Are we the only two?