for the 2zz swap..youd need the whole engine, transmission, passenger side motor mount, ECU, wiring harness, and knock sensor. the Intake
manifold, throttle body, etc. should come with the complete engine, unless you're only buying a longblock which wouldn't make sense.
the debate between N/A and turbo will always exist, however if you want reliability either trade in your car for a GTS or swap the 2zz in. there is one N/A GTS running 13.7's, and numerous others breaking into the 13's as well..which is faster than any stage 1 turbo'd GT with stock internals that i've ever seen without the transmission blowing. dont get me wrong though, turbo is nice, but in the long run it turns out to be much more expensive to safely boost --> build up the engine, buy the c2 gearset, etc etc..