Door Not unable to be unlocked via Key or Eletronically
 

I have recently Purchased a 1998 Chevy blazer, an the guy I bought it from said he just installed the door bc the old one had damage on it. The Door isn't sealed correctly (lots of wind while driving), I have to push the Lock up from the inside to get in, the window rolls down but not all the way bc I believe the door panel is not on right either. Also I have a parasitic draw from somewhere... could this also be the door? Im new to working on vehicles so any help on where to start an how to fix these issues would be awesome thank you

Does the door sag?
Does it look like the door isn't shut right but it actually is?

If so, it's your door hinge pins and a bushings. They will create a sag in the door and also cause a lot of open space for wind to get through.

The window not rolling down all the way, is not from the door panel. that is a problem inside the door itself.

Door doesn't sag, I've found the the weather striping is very old an the seal wasnt tight... this might cuase the window to not go up an down right 2... I have ordered the weather strips I just need to know how to fix the lock... an why key cant turn it... maybe if I spray WD-40?

Oh an the door caused the Parasitic draw... turns out the door never pushed the plastic pin in to let the car know the door was shut... I replaced that as well..