Need to cover brown fence with green but the green just soaks in leaving fence brown.

I bought 2 closet doors, one was primed and the other was not. So now when painted and hung one door has a grey tinge and the other is white. Can I now prime the door and repaint so the 2 doors match?

We are moving to a home just over 2000 sq. ft, and a heavy smoker lived there before. Stinks to high heaven. Lots of recommendations on how to get rid of smell paint-wise (Kilz comes up a lot), but am wondering what suggestions this group has in this regard. We