I'm going to assume that you are familiar with National Instruments Offerings for Motion, and that it is not what you are looking for.
Here is a link, just in case: http://www.ni.com/motion/
The most basic stepper motor control system will look something like this:
LabVIEW-compatible DAQ with Digital Outputs, and Counters. These provide the Step and Direction signals.
A Stepper motor. NEMA 23 and NEMA 17 are common choices. Larger (NEMA 34) and smaller (NEMA 11, NEMA 😎 choices are also avaliable.
A stepper driver with support for step and direction signals in the voltage range that your DAQ can supply. This is typically going to be 24 VDC.
The torque capability will depend on the driver, the motor, and the speed that you need to run at.
