engine issue

So just bought my first Lx470 with 167k on it. Driving it back on the highway from where i got it, it lost power and died. It flashed the check engine light and the a/t fluid heat light. got it off facebook marketplace from a competent man so no shady business there i hope. anyways. towed it...

I first noticed a slight stumble at idle when stopping at a stop light. No check engine light. Thought I might have picked up some bad fuel or something. In a day or two the check engine light did come on, so a friend scoped it with his DIY gadget and it came up with a problem at the #2...

I've owned a few 80's over the years all in great working condition, but this is the first 80 I'm looking at that is not in running condition. 94 Land Cruiser US spec Gas. -Seller states the ''oil pump went out'' ....Claims he was driving and the temp gauge went up and the oil light came...