Ok, here is the stock list you need to get the power you want
Exhaust - (u have it already) but make sure you have a split dump pipe on it
Cold air intake - You could add a pod in a box (ie Maxx's group buy) or just get a decent panel filter for the stock box (good for over 200rwkw and the cheapest option)
Intercooler - Dont need anything too special, just a reasonable front mout will do the job.
Boost controller - a simple bleed valve if the budget is tight, but some of the electronic ones are available at great prices (especially second hand) and are well worth the cost as they offer much etter control and protect against oost spikes and drop off.
Fuel pump - if yours is stock and the car has over 80,000km its probably going to struggle with the bigger horsepower, so check it out and replace if necessary
Electronic fuel and ignition management - I prefer the PFC, but their are other options (again second hand is fine)
Dyno the whole lot once all of this has been installed.
As mentioned SydneyKid has a great group buy on suspension, but if cash is running out at least invest in a set of pinapples.
This setup also gives you a sound base if you want more power in the future - just add a new turbo, and perhaps bigger injectors or a rising rate fuel regulator.
If the car is close to 100,000km you will also need some cash for a new timing belt and water pump.
Hope this helps.