You will need a certain binary sequence to run steppers, and possibally a transistor driver array.
Most steppers have a standard code, however, companies like to be different.
to test the sequence, simply put each lead of the stepper as a input to the base of a transistor (a general one will work), and put a LED in relation to the collector so it turns on when pulsed, and the emmiter to ground using a 10 ohm resistor. Each lead will have it own transistor in sequence from pin one to the last. Spinning the shaft will repeat the sequence over and over. One of the pins is power.
Luckily those steppers are 4 bit binary driven.