Yes on ptfe, aka I like a plumbing paste I found at home depot with ptfe. Basically it's liquid teflon.
You have a black plastic upper intake? If yes.. search on me and L36 UIM failure, then How to mod a LIM. Both are important if you are L36 and not L26.
On the TB, always remove it and clean it with a can of TB cleaner. It's well worth the effort while things are apart.
Your gasket kit will come with some black rtv for the corners of the LIM, beyond that you shouldn't need any. I do like to have a case or two of brake cleaner on hand (I nearly drink the stuff), it's great for taking any oil etc off the gasket surfaces for the new gaskets.
