When I go to crank my car up white smoke comes out but the only time it do it. How do I fix this?

If it is white/blue smoke it is oil and if it only happens on start up after the vehicle has been parked for a while it is the valve guide seals that are leaking, allowing oil to seep onto the valves and into the cylinders. The seals will have to be replaced and they are under the tappet cover on top of the engine. This condition should also cause a puff of smoke to come out of the exhaust when you take your foot off the accelerator to run against compression.

Sounds like white smoke is antifreeze. It might be leaking all of the time. Does your antifreeze level fall gradually over a week's time?