Nope, I'm not driving it but to run around the block to diagnose the issue...
I would still do the engine block test to confirm the issue.
If you caught it early enough you will likely just need to replace the gaskets and not worry about refinishing the heads and all that.
If it turns out to be the head gasket and you feel confident in your mechanical abilities: (Most of this can be had in the AirCabinMan kit on ebay),
1 Radiator Koyo A1998
1 Head Gasket Kit Fel-Pro HS9227PT1
1 Head Bolt Set Fel-Pro ES72168
1 Timing Belt Toyota 13568-69095
1 Idler Roller NSK OE 13503-62040
1 Tensioner Roller Koyo OE 13505-62070
1 Front Crankshaft Seal Toyota 90311-40022
2 Front Camshaft Seals Toyota 90311-38051
1 Water Pump Aisin OE 16100-69398-83
1 Water Pump Gasket Aisin 16271-62011
1 Hydraulic Tensioner Toyota 13540-62021
1 Thermostat (82°c) Toyota 90916-03075
1 Thermostat Gasket Aisin 16325-62010
1 Radiator Cap #16401-20353