All gasoline engines have one or more coils. But in modern ones it's usually more than one (perhaps even one per spark plug) so the old methods don't work. My Mazda (the 87 Toyota it replaced was similar) has 2 coils that are each potted and integrated with the plug wires for 2 cylinders. OTOH, with some cars you can use a Vulcan Nerve Pinch (some strange combination of turning lights on/off, pushing door switches, etc.) to get computer codes read out by flashing indicator lights, in a display, or whatever - helpful if you have the book but don't have a code reader handy.

Unfortunately, many modern cars are fully capable of lasting too long. My Toyota was like that. I had to retire it to Father Joe (it's probably still running around Baja someplace) when it became impossible to smog (needed a cat, and there were none that fit it - Toyota didn't support it any more at 15 years old). It was still running fine, leaking nothing, and getting 25+ mpg when driven hard in town at 130K miles. And no rust (a California car from day one - NUMMI). So it was one piece of unobtainable smog gear that killed it. Same thing will probably happen to the Mazda, eventually; maybe a decent and affordable electric (those two criteria currently don't meet up) will be around by then.