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Photos would help to be sure but it sounds like one of your power steering hoses is leaking - all Y60/Y61 Patrols have power steering.
It does need to be fixed ASAP, if you run out of P/S fluid you can do expensive damage to the pump, and the increased steering effort poses a serious safety risk if it happens when you are not expecting it.
With the starting issues I would think RACQ are correct that you do have a dead battery. Driving the car around for a while will put a surface charge in the battery but it is unlikely the battery will hold the charge very long.
I'm not sure about the radio and A/C not working but it could be a burnt out fusible link beside the battery. Fusible link look like a short piece of wire (about 12cm long) connected to the positive battery terminal on one end and a plastic connector on the other end. I can't be sure because the wiring diagram I have is for 12v systems.