From my dealer:
Nothing here looks concrete but it at least gives us some info. I think he was getting frustrated that I was calling him with info before he got it.I am still working on finding these prices, you probably have already got them but
this is what I found roughly not exact. These are possibly not including installation
they do not have accessory prices on toyota's web site as you know.
TRD exhaust $499
Rock rails $270 each
Roof rack $599
Skid plate $375
Driving lights $390 mounted on roof rack
I believe that airbags will be around $650 and I haven't been able to find anything on the Garmin GPS.