Oil catch cans should have an inlet, and an outlet, the putlet either goes back to the intake air pipe or vents to atmo... without the outlet, the can will pressurise
tyre press for street tyres.. start with 34 psi and see how the car feels
oil temps - assuming your going to mallala, do 1 warm up lap, 2 flying laps, 1 cool down lap, then two flying laps, cool down, etc etc duntil the session is over.
tools - cable ties, race tape, socket set, side cutters, 1/4 drive socket set, hammer, plyars and some stainless steel cable ties, this is what i usually take. along with spare hoseclamps and assorted consumables, pays to take water and oil too.
you can overfil the sump by an extra half a L.
have fun!