In reference to bad thing.
At this point, repair quote was basically the same as the cost of the car. The sensible thing to do would be to put it out of it's misery, it is after all, to most, an old Toyota Corolla. Most have ended up in scrapyards for less. Really, my decision was pretty much made up.
Cue A-Team music
Them Nightbreakers work pretty well, eh?
Of course, it needed to be repaired, no question. Fortunately I'm not sensible or logical, and it is against my religion to personally scrap a Toyota.
I've only done 30 miles so far since getting it back earlier tonight, and it seems to be OK up to now besides a slightly loose alternator belt. The garage gave me my old head gasket as a souvenir because of how bad it was.
Exhibit A - Coolant channel next to cylinder 1
Exhibit B, Cylinder 4 - And God said, Let there be light: and there was light. And God saw the light, and it was not good; and God divided the fire ring from the gasket.
Also the whole gasket was sort of dissolving, this black gunky crap here was some sort of sealant that had eaten into the gasket and was just falling off in lumps.
However, it is back. Head gasket done, head skimmed, coolant all flushed out and replaced with good stuff, oil and filter change and new belts.
Let's hope it's all good now.