New owner with non-starter

The answer to that is…possibly.
Let me explain.
The timing mark on the pulley is mounted on the outer metal ring.
This ring is bonded to the inner part with a rubber part in between. A really common problem with these is the outer part becomes disbonded, so the outer part cn move independently from the inner. This makes the outer mark unreliable as a guaranteed way of checking the timing, unless you KNOW the pulley is good.
Also, we have had several instances of the pulleys been incorrectly fitted. There is an alignment pin, which I have seen crushed and distorted, as the pulley was fitted, making the pulley mark unreliable.
For checking of the cam timing, I would be inclined NOT to use the pulley mark as a reference, and use the toothed wheel instead.
The mark on the pulley really serves as a way to measure base timing.

As a guide, the no1 cylinder should be at TDC with it all lined up.
Also, you should be lining up the crank pulley, and checking the cams, not the other way around. Sounds academic, but it really isn’t. Keep turning the crank pulley until no1 cylinder is at TDC , with the crank lined up. (using a reliable mark)
Then you can check the cams.

I personally think you are probably barking up the wrong tree here, as you have stated the engine runs briefly, and nicely.
Still, good to be certain though
I would also do a compression test on all 6. You are looking for similar numbers from all 6. It’s more important they are all similar, than looking for actual numbers(within reason) No more than 14psi difference between cylinders. Reason for this is, you will probably use an off the shelf tester, and there is no way the gauge will be accurate. It WILL give you differences though.

Like I stated above, you can chase your tail for ages, fault diagnosing. Entirely up to you, of course, but you could spend ages guessing, spend a fortune guessing, and still not fix it.
Not trying to put you off at all, just so you are doing this ‘eyes open’, and we don’t get a thread later on stating, “these cars are s**t, and the owners club doesn’t know jack” I have seen it happen too often in situations like this.

Personally, given your inexperience with these crs, I would ship it off to Ben at Eurospec, get it fixed. Drive it, enjoy it.
They are an expensive car to learn on, and it usually doesn’t go well.

I certainly wouldn’t be asking a local garage to look at it!

Marty