Depends on your mechanical experience level and knowledge in general. My first time working on a car was doing a headgasket, water pump, sent head out to be machined, and radiator replacement all on my own when I had my Eclipse. Read the manual forwards and backwards several times and was patient, and yes it ran well afterwards.
If you are going to boost, it is always best to ask plenty of questions and research forced induction before acquiring the parts. I started reading a couple of years ago, and have recently pieced the kit together and installing next week. You could check out my thread in my link if you are going with the Mazdaspeed Protege Turbo and "accessories."
it adds up dude...hell now that its summer my stock radiator cant cool the damn thing so thats another 3 bills...if you stay stock it shouldnt be as expensive though
I have a ported manifold that can help you out
http://www.mazdas247.com/forum/showthread.php?t=123747157
The MP3 comes stock with that manifold. No VTCS from factory..
heres what you need to do......do NA mods that transfer over to the turbo application....get yourself a FULL j pipe back exhaust... dont buy a premade one...go get yourself one custom done at a shop....SOOO much cheaper...go catless if you can...idk if they test down there... also front MM and side inserts are a must. then start snaggin deals on turbo parts...could go ahead and buy the necessary gauges also