no, you can still get it to run being a tooth off. I drove a car that was off just like you. It was a pain to start, and wouldn't idle for crap, put it pulled pretty hard once you got it over 3 ish grand.
No bent valves or anything like that.

As for the 0 compression, that had to be an error with the tool itself. Maybe it didn't seal or something like that. Even if the piston rings are totally fried, you'll still get some kind of bump on the compression meter as the piston comes up. You're moving a lot of air even if it isn't sealing enough to compress.
AND, more on that, it wouldn't be 0 on all cylinders. That just didn't happen.
The only way it would be totally screwed like that, is if you forgot to put the pistons in when you rebuilt the engine.


When you try to start it, what does it do? be detailed.

tear into it and fix the timing. and try to start it and see what happens.
Its gotta be something simple like that keeping it from running.