What is the easiest way to make a stepper motor go?
Assuming you really are using a stepper motor (?), you'll need either a stepper motor driver, or a microcontroller and a basic current driver (chip or a few FETs). You'll also need to know whether your motor is unipolar or bipolar. Without these, there is no way to apply current to the correct coils in such a way that the motor will move. I'm always keen to suggest the Pololu A4988. It's very simple to use, relatively inexpensive, robust, and makes driving a stepper motor almost exactly the same as a DC motor. Bringing the "STEP" pin high and leaving it there will run the motor at full speed, just like a basic DC motor. Pulsing the input allows for slower, finer rotation control. It's also simple to drive a stepper from an Arduino; All you need is an Arduino and a ULN2003A current driver or similar. 

It's also useful to understand how the device you're trying to work with works. I'd suggest you check out this quick little bit on steppers.