So here's your tidy list:
Aquarium
lighting
substrate
filter with media
heater
thermometer
live plants (preferably)
decorations
food
ammonia (for fishless cycle)
liquid test kit(s) - API Master Kit is a good place to start (includes ammonia, nitrite, nitrate, pH, high ph) Salifert is also a good test kit, but far more expensive than API in US. Nutrafin good too.
bicarbonate of soda
pipette in 5ml or 10ml
a couple of buckets
gravel vac
"sponge on a stick" thing for cleaning the inside of the glass
a fine net for catching fish
and some old towels to absorb any spills at water changes
dechlorinator for the water, preferably Seachem Prime or StressCoat+
polystyrene to go under the tank (maybe ... I don't but lots do)
And it wouldn't be a bad idea to get some ich medication and an antibiotic like Myxazin because fish always tend to get sick late on a Saturday night. Not quite sure how they know, but there you have it.