shipping from overseas is quite pricey, however if you are looking at buying more expensive hardware, then it may end up saving you a fair bit of cash shopping either from the states or europe / UK [even after gst, import tax, etc]. some stuff you will find is about half the retail price it is here. if anyone tries to tell you different, they are probably a distributor . the advantage of europe over thet states is that anything that requires power to run will work here, as it is the same voltage - therefore only requires an adapter plug. stuff from the states is 120v so needs a stepdown transformer.
as far as livestock goes, youree pretty much SOL trying to import stuff - you will need to buy fish from the pet stores, but most people will either give or sell you coral frags from their own tanks.
as far as advice on setting up a tank, there are plenty of poeple on this forum that will be more than happy to advise on anything you want to know. just dont mention sand beds