If it came off a Micra And you have everything then iT shouldnt be so hard. You need: manifold, turbo, oil feed line, oil drain line, sump Or plug to fit to your sump, piping from turbo to throttlebody, Some vacuüm lines, a boost gauge, downpipe (Maybe complete exhaust If the downpipe doesnt fit the current exhaust) some engine management to control fueling.
That was about iT. Might have forgotten Some stuff. Do mind you cant run high boost levels on a stock engine. About 0.6 bar is the max if i remember correctly.