Sounds like you might have a Chinese multi meter if it was like $6 it's probably a junk one that can't make accurate measurements. If it's not a super cheap one, the battery might be dead that can make it read real funky some times. You shouldn't see the values jumping all over the place or anything. Should be able to read it, take the probes off and hook them back up and get a similar reading. The reading vs 200 and 2000 ohm setting shouldn't be wildly different, but probably around +/- 10%, you're readings are showing like a 80% swing.
Anyway, stator voltage seems pretty much in the area I'd expect. The coil reading is real hard to be sure but the fact it's putting anything out shows the CDI is doing something and the pulse generator is good enough to trigger the CDI. Half of the fight could be the "ebay" in your message that basically means no name China. Sometimes they can work, a lot of times they don't work right, and sometimes they don't work at all, all in the name of no quality control or integrity.
Here's the OEM coil brand new, if you went this route I'd suggest replacing the spark plug cap as well.
https://www.partzilla.com/product/ho...7cbed5ce5b88a8
https://www.partzilla.com/product/ho...7cbed5ce5b88a8
Anyway, I recall you testing parts from a foreman, if that machine runs, you could try to swap the ignition coil over to that machine from the 350x to validate that it at least functions. You could also take similar readings on it to get a rough idea what a working machine would read, The only exception is I'm not sure if your machine has the DC CDI or AC CDI. TRX350 vs TRX350D, the CDI type was the opposite on those machines from the same era. Coil should work on both though since I'd expect the output would be similar to the 350x.
The voltage reading on the coil wire kind of makes me think it's the output of the CDI that could be the issue, but it's a very short pulse vs a "normal" AC power sine wave. Getting a used 350x CDI box and an OEM ignition coil and I suspect it should run. Also you mentioned an ebay stator, I'd be fearful that it's not balanced right big time with all the other 3rd party parts, but I have zero experience with them. Did the stator come with the fly wheel? There's 2 designs of the stator and fly wheel, so they must match together or you'll run into issues.
Photos would be interesting as well since sometimes I can see something in the photos that could be causing the problem. Like if the handle bar controls were replaced, the kill switch operation could be backwards from normal.