What is this leak?!

no worries bud...I did find out that Toyota has created a replacement part that is all one piece as well but metal.

 

Thanks for the diagrams! These are super helpful, looking at the intake...throttle body sits on top of intake...wonder if I can leave the throttle body attached? On another note, my main concerns are getting everything back to the way it was before I take it off...

 

My 2011 may have a metal center section. It's really hard to tell because it's soooo... down in there.
You should be able to leave the TB attached just pull the coolant lines that run to it and unplug the harness from it. All the intake gaskets are compression o-rings so you shouldn't need to replace them unless they look permanently compressed or they just look bad.
At your miles it probably wouldn't be a horrible idea to change the thermostat and gaskets. Since you'll be right there at it anyway.

 

I am scared...

 

I got under there and looked at what I am dealing with. Looks like I could drop the starter and take the bottom of the intake manifold loose and slide that bypass hose out? I want to think I would get enough room after loosening the intake manifold that I can get that hose out.