Your circuit is doing a DC sweep, where V1 is stepped from 0V to 12V in steps of 1V. There is no "time" implied in this sweep; rather, you are doing 13 discrete .DC solutions, at 0V, 1V, 2V,...12V.
To change this simulation to a "time based" .TRAN simulation, you have to do two things. First, you have to decide how the independent voltage source V1 varies with time. Do you want it to ramp up, be a sine wave, square wave, pulse, a lookup table of volts vs time, etc, etc? You tell me what you what to do, and I will suggest a way.
The second thing you have to do is to tell Spice that you want to simulate where time is the independent variable. You do that by right clicking on the schematic background, selecting EDIT SIMULATION COMMAND off the menu, selecting the TRANSIENT tab, and putting in the ending time of the simulation to be run.