jump leads, cheap 3/8th socket set with everything up to 19mm, cheap spanner set with 8 to 19mm, phillips and flat screwdrivers, pliers, Bluetooth code reader, zip ties, 2 spare coil packs, 1 of each "important" spare bulb, some fuses, WD40 type spray, jack, wheel nut brace, the alloy nut key adapters, 1 spare spark plug in a box, and a spare serpentine belt. It all fits inside the spare wheel so doesn't take any extra room.
Im good to go.
Of note, no self-respecting Toyota drivers goes anywhere without some zip ties.
Ive said this before - some may think this excessive. BUT - once you have been in a "stuck at the side of the road in rural wales at 1am in the pouring rain shouting MY KINGDOM FOR A 14mm SPANNER" situation you never want an experience that again to the best of your ability.