You've the order correct. Air filter initially, to filter particulate and prevent it from going any further into the system, then on to the turbo where it gets sustantially heated due to 1- turbo runs off exhaust gases (typically very hot), 2- the compression that takes place in both exhaust gases and intake air and 3- hot engine oil running through keeping the turbo bearings lubricated. Everything is now super heated and not the most efficient in terms of air density. Thus it's off to the intercooler, which is simply a heat exchanger attempting to keep the air cool. Then into the engine in a slightly cooler, denser state.
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