My old J-reg 1600, which looks rather (!) rough is due an MOT.
The radiator has a small leak, so it needs topping up every few weeks. There's a nasty oil leak that appears to come from the head gasket (I've just spent some time cleaning the grot off to see where it leaks. The nearside sill has a small blister which may go through when tapped by Mr. MOT man. The windscreen is taped up to stop water getting in.
Last year it had front disks/pads/CV boots. This year it's had a downpipe, cam box gasket, N/S CV joint. It doesn't burn oil. The tyres aren't bad - 4mm, say.
It's done 157,000 miles.
Would you try to MOT it, or change for something else, bearing in mind that money is *tight* - I could spend a few hundred, but would like a reasonably long MOT and at least some tax.