Diff Fluid swap, you'll want a square-drive hex bit to put on a breaker bar. Allen keys just won't cut it. Other than that it should be easy. Mine is due to be done.
Fuel filter, you'll need pipe spanners for (flare-nut spanner). Both my Supras were easy on this one. You have to pull EFI fuses and turn over the engine to depressurise the fuel lines, and have a rag in place anyway as fuel will still piss out a bit. It's just behind the passenger front wheel arch.
Oil filter, best to put a marigold on for better grip, and a tesco bag around it to drop into, then go at it with your hand bent around the passenger-front suspension pieces
Spark Plugs, piece of cake with a set of allen keys for the cover.. You'll need a specific spark-plug socket though which is like a deep socket but it also has a rubber collar inside to grip the plug so that it lifts out of the deep well after unscrewing. Better order some of the rubber vent hoses if they haven't already been swapped.