If you are on a budget........
You can buy turbo timers for as little as $40( ebay is your friend), thats all you need dont need all the fancy wancy things that come with it .Boost controllers are cheap too $30 for the very basic ones which do run into spiking issues though, thats what i have found with some of them.Turbo smart brand do reasonable ones for around $100 but yes very easy to install.
The intercooler , depends on what type of blitz unit but $1200 sounds pretty right also including install, but there are cheaper kits around,depending on what you want to do to the car, ie after big horsepower or something just comfortable for the street.
You can get complete exhaust throu many companys, xforce brand do a great bang for buck, i think just jap sell them for around $750 complete (including dump pipe) supply only exhaust.Buy it and get some the boys up here to help put it in for you or a workshop, many to choose from.
Hope this helps