Landylover and Powderpig are giving you some excellent advice.
First thing, fill it and carefully listen for any sign of knocking.
Here's a clue to the condition of the rod bearings: In the morning after the truck has been sitting all night, go out and start the engine, while listening to it very carefully. for the first 1-2 seconds, that engine is running "dry" while the oil pump picks up oil and pressurizes the system. During those 1-2 seconds, you will have a chance to detect any rod knocks coming from the big-end-bearings. Once the oil light goes out and the pressure is built up, the knocking will disappear.
So, try this, maybe for two days in a row, to help you determine the extent of any damage.
After doing this to get a rough idea of their condition, If they sound quiet, I'd still remove the oil pan and while I'm in there, simply replace the bearings shells with new ones. You don't need Toyota you can use any good brand, they're really all pretty good. if you want, use Toyota.
While the rod caps are off, carefully inspect the journals for any scoring or heat damage, hopefully there won't be any. If they are still smooth, you're probably good to go.
It's surprising how long an engine can run without oil before it seizes up, but the bearings do start to overheat and deform much sooner than point of seizure, so even if it was a mile or two from seizing, you may still have some bearing failure. I would NOT drive the truck at all until you perform the above tests, otherwise you may really help it along to the graveyard.
Oh, and dude, you need to have a serious chat with the wife. She needs to learn that when any of the warning lights come one, the time to reach for the ignition key is RIGHT NOW, not 6 very expensive miles down the road. I've brainwashed my kids and wife with this concept, and on two occasions it has paid off! I got them to the point where they scan the temp and oil gauges like every minute or so.
Dana