You are very lucky. My car did the same exact thing. Coolant disappearing, loud ticking for a short time when it was cold. Turns out coolant was in my oil and thinned the oil because the LIM gasket was bad. Had the LIM replaced and the oil replaced, but once the coolant mixed with the oil, irrepairable damage had already been done to my engine. 2 weeks after replacing my LIM, my engine blew, spun my lower bearings caused by the damage from coolant in the oil and had to have another motor put in. Not even a month after this second motor was in, LIM again! But, this time i caught it on the day the LIM failed as i smelled the coolant through my vents. That was over a year ago also.
You are very lucky you didn't have permanent damage to your motor from the coolant (the ticking noise was the coolant in the oil). Maybe because i have a supercharged car and use the supercharger alot, that may be what caused my engine to fail faster? Either way, i don't want to have to go through that again.