I arrived back in Austin this morning at 4am. The past week I drove the 1800miles. This afternoon I went out, pushed power button, get out and clean windsheild off and ICE turns on with this glunk glunk noise, shook the car like a sob too. Checked oil and it showed a clear metallic gray/Black tint with end the light tan oil. 64K miles (4k left on Toyota certified 15k warrenty) looks like tomorrow at dealership for oil analysis. I run Mobil 1, just incase some one ask.
Might have been the famous cold start-up rattle that effects these GenIII's. I would guess yours has had the TSB done for the intake manifold, but it wouldn't hurt to ask the dealer when you go. It doesn't fix it on all of the cars and many never experience it. There's other threads about the issue as well as the TSB. Here's the one regarding the TSB: NEW!!! Service Bulletin for Engine Knocking at Startup T-SB 0012-10 | PriusChat
