JBL audio

I recently bought a 08 Camry Hybrid without the JBL sound system in it.  I wanted to add XM, so I purchased a 2007 JBL head unit from eBay.
 
A couple of questions:
 
Do I need to purchase an amplifier (there doesn't seem to be one with the system that was installed)?
Any suggestions on an OEM XM tuner?
 
Thanks...

If no seperate amp on the installed unit then you would need to find one.

There were a few Google sites that offered plug in type XM installation products.  See below:

http://www.coastaletech.com/xm_radio_in_prius.htm