Again, consider that advice is normally worth whatever you pay for it and I am no teacher. However, I did fight this problem when I started playing so I am not without hard-won experience. What I mean by closing (or squaring) the clubface at impact is that you must turn your wrists over through impact so that the clubface is square to the line you want the ball to travel. Many people will leave the face open because they do not allow their wrists and forearms to rotate through the shot. When I say "hit the ball with the toe" I mean try to turn the clubhead over so far through impact that the toe of the club hits the ball instead of the face. (You probably couldn't actually do this, it is more of a sensation thing to practice that will get you to rotate your wrists). Try it on the range and see if you get any improved results with your driver.