Just ask the autozone people to get you really cheap brightly coloured coolant that smells sweet. That pretty much describes most of the stuff out that. It will only cost you a few bucks.
Again, why are you looking to top up your coolant? Do you notice a leak somewhere? No, the smoke is not from your coolant. If it was, your engine would be overheating as well and as i recall you said the temperature was normal.