Was wondering if the sirius sir-pnr2 would work with the tc radio? or even if the sir-pnr1 would seached but didnt find anything so hopefully someone knows the answer!

The only problem is that the factory radio does not include the IP bus connection... because of that any aftermarket add ons for pioneers will not work.

so is there a adapter yet that converts from IP-Bus to the scion type bus?

http://www.scionlife.com/forums/viewtopic.php?t=127147

(Currently) all Scions use the same radio.

so is there a adapter yet that converts from IP-Bus to the scion type bus?

not that ive seen, i could be wrong but I havent seen any.

Usually people just get an aftermarket radio due to the many advantages over the factory one.... and they can usually get XM or Sirius.

No IP-bus integration in the stock stereo... It's really a Toyota radio built to Pioneer specs, so no IP-bus or RCA's or anything like that.