Intake plenum as mentioned is the o oo oo o gasket. Thats the only one you need, so you are good.
The throttle body is attached to the intake plenum and the air box. You can remove the throttle body and manifold together, I think so you probably won't need a gasket. I ended up taking my throttle body off first, so I got one for 90 cents at the local dealer.
X2 on the coolant hoses. Those stupid rubber hoses caused me a lot of pain the last week.
You have two short hoses from the upper manifold to the throttle body. 2 other coolant hoses on the back of the engine block that are easier to get to with the manifold removed. Those two were leaking for me. The upper manifold also has another U shaped coolant hose and a U shaped crank case breather hose. My coolant hose was leaking, the breather hose was not for me though.
Also, all of the vapor emissions lines...check them out while you have everything out. I had a few of those dry rotted that were just a matter of time before it was a check engine light. I got similar line at Auto Zone and replaced some and zip tied them nice and tight.