OK, the click may just be the noise you sometimes hear from the valves, rocker arms, and push-rods working, so I wouldn't worry too much about it just yet. See if you can get the motor running and adjusted correctly, and the noise may disappear. (Or you just won't hear it over the sound of the engine running.)

Some white smoke is normal from an engine, especially if it's new and you're just now breaking it in. You'll just have to use your judgement/experience to tell if there's too much smoke, which gives you a clue that the HS mixture is too rich.

The fact that the engine won't idle well may be because of either the regulator setting or the idle screw setting or both. Try my suggestions for getting the engine to start again, and then if you can get it to start maybe we can step through the process of getting it adjusted right.

David