The opener was probably a flashforward to the final episode. The pills Walt was taking honestly were far more intriguing than a gun, even a big one, and a duffel full of money, even a big one. The title obviously is intended to hint at the climax and we're suppposed to think Walt is going to live free, or die. Which presumably means Walt thinks he needs to kill someone to do so. Mike, Jesse, Saul, Hank, a new party as yet unintroduced? Walt has done everyone wrong in some fashion or other. But why would he need to kill someone if he's going to die from recurrent cancer?