Old ford door locks. The type with the plastic cover on the outside of the door.  
  
If you place a small flathead under the cover and pop it off you can then use your fingers/pliers to pull the metal bar inside to pop the door lock open.  
  
If you don't care about the car you can always just slide a long heavy duty flathead down the window seal and pull on the screwdriver to make the window shatter.   
  
Don't break in to cars but if you ever need the info it's right here.  
  
PS: It's pretty easy to jam a flat football in to the door jam and then inflate with a foot pump pushing the door open enough to reach down to the door lock.