Satellite Compatible Radio?????

Hi. Just bought my 2010 Taco and it's equipped with satellite radio compatibility. Says it is (XM) prewired and has antenna. It also has a usb connection for the ipod below the radio unit. Can anyone tell me what components I will need to get satellite radio reception and what I may be looking at for cost. Also as it says it's XM compatible, is there anyway to change that to Sirius as I'm already a subscriber? Can anyone give me information on how the Ipod connection works. My friends has a stereo with Ipod in his glove compartment and it's controlled right through his stereo. Do I need additional parts to do that as well?

Thanks in advance for your help
Cape Chick

 

http://www.tacomaworld.com/forum/audio-video/28731-sirius-factory-radio-install-2009-tacoma.html
That thread describes it all..
To use the factory radio it cost roughly about $200 in parts.. The "XM ready" is a scam. The only the truck has is an antenna.