White smoke is steam, which means water is being evaporated and sent out the tailpipe.
Here's the question; is the steam coming from condensation in the exhaust system (normal) or is it coming from coolant leaking into the engine's cylinders (not normal)?
Have you had to add coolant to the radiator?
A quart of oil in 3,000 miles is not unusual for a vehicle with 125k miles. You're changing oil more often than necessary. Check the owner's manual for the correct oil change interval. You might be able to save some money.