The manifold there looks like a T3 fitment, which is a good start. Starting with the questions:
Throttle body...Why? You won't find a need for anything that flows more. If you do make it to that point one time, you'll have a more pressing motor need...
Head...if you have a ported one, use it. Not really worth the money if you didn't. Again, see the pressing engine need above should you run that kind of boost.
Intercooler...I've never looked for a RAV4 one before. Check the net of course, but I'd be tempted to look for a used Celica air to water unit. Compact, effective and fine with the little pressure you will run it should work fine. With the others, no need for more flow than it can handle. Motor go boom long before.
Appears you have oil lines from the pic, so you should be fine there if you put them on alright.
Downpipe appears to be there as well...if not, an exhaust custom shop can make one for you for a couple of hundred.
plumbing: you'll need either mandrel bent aluminum pipes or, silicone elbows and straight sections of pipe to get the intake air into and out of the turbo. Pressure is low wnough that silicones should not pose a performance problem, and with T bolt clamps will stay put. Remember that the mass airflow sensor has to go pre turbo. Most don't like pressure!
That's all I can think of right now...that and I'm late for dinner out this evening

Women before turbos...sometimes...
Bob