Nasty Oil & Nasty Noise...

Maybe you should get the codes read on the car? That will tell you why the triangle is on

When you say right side, is that the passenger side?

 

How old was the oil when you changed it and with how many miles?
How much oil came out when you drained it?

 

Did the red exclamation mark go away after you changed the oil? If so, low oil pressure is what turned it on.

If so, and 3-4 quarts of old oil didn't come out, the I'd say you haven't been checking your oil and now need a new engine or new car.

Tell us what the code reader says and how much oil came out and we can probably tell if the noise is what it appears to be -- destroyed bearings.

 

The red triangle that comes on for a second, is the second that the car has no oil pressure. So you should start paying attention to the oil burning, it will get worse

 

Here is the video to hear the sound, just creating as link to make it easier:

 

Does not sound good. Hard to diagnose over the internet but with what you said about low oil. You may need to do an engine.

 

While the catalytic emissions control system is still functional, no, there won't be much to see or smell. Eventually the extra pollutant load of an oil-burning engine will overwhelm or clog the catalyst and then you're dragging a smoke show.

The normal way to detect oil loss is by periodic dipstick checks. Nothing else satisfies.

Noticing (and appropriately reacting to) a low oil pressure alarm is a last-chance emergency situation. If you hear/see it and shut down within seconds you are probably okay. If not, well... you can wind up posting sound clips and shopping for engines.

 

If it was done at a Toyota dealer and no prior problems with the car, it is quite possible the problem started there with an incompetent technician. I’d contact the dealer with the facts you have and see what they come back with.

I once had a problem with a BMW dealer who screwed up an oil change. When I contacted the dealer a few weeks later they said, “no we didn’t do anything wrong and besides that guy doesn’t work here anymore.” It was especially curious because I never even mentioned the guy’s name.

Toyota may be more helpful. If the dealer does not help, go up the food chain to Toyota Customer Care corporate division and open a ticket via their 800 number. Toyota does not ignore such problems if real. Make sure you lay put the facts clearly and are not belligerent.

 

Clue #1 that the engine was not getting lubricated.

Leaks are rare in modern cars. Oil burning is very common.

Whoever changed it should have first checked the level and advised whoever took it in that it was low. (And I'm sure it was low.)

As @JC91006 pointed out, that intermittent triangle is the car saying, "I have no oil pressure and so my bearings are wearing out."

You probably wouldn't see the tiny bit of smoke that escapes the emissions system. But a 30- second visit to your dipstick would tell you the story.

And that's almost the final piece of evidence that engines will eat themselves if they don't have enough oil. The next stage is a broken connection rod and one or more holes in the engine block.

Sorry, but that engine is scrap metal now.