TurboCNC doesn't care what it's talking to. As a matter of fact, it will spit out step and direction signals all day, even without anything connected to the parallel port. There is absolutely no feeback to your software. The drive does all the work, the software just tells it where and how fast.
Almost every hobby based stepper motor driver is built around step/direction signals. Just wire the parallel port outputs to the driver inputs (usually via a parallel port 'breakout board') and connect a power supply. Your biggest concern should be the type of steppers you are using and there power requirements, which will determine what driver you use. For example you can't drive a bipolar stepper motor with unipolar driver. Good luck.