You don't need a filter unless you need to capture the smell and If you're growing in a nice environment you probably don't need a real duct fan for a setup that small.
Things not listed that you're going to need - some sort of pot (I might suggest a tray to act as a raised bed rather than a tall pot in order to get enough soil volume for the roots depending on your plans), soil, nutrients, calmag, probably some pH Down, seeds or clones, a timer, a ph tester, some trimming shears, a way to hang and easily adjust your light, a few jars and GWE. A couple of scrog nets would help to keep the canopy low and spread out. You'll end up with more and you could possibly get away with less but this is enough to successfully get you from seed to smoking.