If you read my post again you will see that I said 'that engine was finished' this was based on my knowledge that he had run it low on oil and that those engines don't blow blue smoke.
You have said that i said 'an engine is finished' this is a totally different statement and one which I did not say as it has totally different connotations. For example I have a Austin A35 that is blowing blue smoke, I do not think that the A series engine is finished as I am dealing with it in a different context then the Op's engine.
It would appear that you have taken me up on a comment that I didn't make.
As for your comments on them not blowing blue smoke but their ability to consume oil. I can only assume that you have not worked on the 4afe engine in question. If you had you wouldn't be coming up with juvenile questions like that.
You have vast knowledge of car mechanics I'll give you that but you won't catch me out on this subject as I have greater knowledge on this car than you.
I don't need to try to 'catch anyone out'. You rightly say they all burn oil as the mileage rises, how do you think this oil is being burned? It leaks through the stem seals on these engines , as the problem gets worse, smoke will be visible, initially on start up and eventually any time the engine is revved. Most Toyota A and E series engine of the time suffer this problem.
There are only 2 ways oil can leak into the combustion chamber, either through the piston rings or through the valve stem seals, a leak down test will show any issue with the rings/pistons etc. If this is ok then the stem seals need changing and this can be done without even removing the head.
If your point it that because this engine has been run low on oil a number of times and therefor is ruined, well first of all if damage has been caused it will be noisy when running, second, damage begins in the head as low oil pressure leads to the cams/lifters etc being starved of oil first so the condition of those, and therefor the likelyhood of further damage, can be assesed when the rocker cover is removed.