Okay, let me embarrass myself by trying to handle this.
First off, the TBB6560 data sheet is available via Google ... buuuttt ... because I'm such a nice guy, I've attached it. (I hope.)
PUL is pulse - one per step, voltage no higher than the power to the chip, DIR is Direction, same voltage restrictions, and EN is Enable, again same voltage restrictions. They should operate from TTL levels - ie, somewhere in the 2.5-3.5v range. +5 and GND are pretty clear. +24 can actually be anything equal to or above the chip power voltage (+5v) with the chip being able to support up to 40v. Why the limited it to 24v is known only to the driver manufacturer. Anyway, it's the operating power for the motor. The A+, A-, B+ and B- go to the motor windings with the "+24" going to the winding center taps or the closest local equivalent. I'm hoping the wiring I have for the motor is the same as yours. If it is, the black & white leads go to the +24v connection, Red to A+, Yellow to A-, Brown to B+ and Blue to B-.
The motor power may be an issue even feeding it with only 5v. Knocking that down to the preferred 3v would require a regulator in the power feed to the motor (the +24 connector) and I'd need to think about the best way to create one. The chips exist up to around 3 amps but I'm thinking about the pulse current which can be several times the holding current.
The switches at the bottom ... I'd leave them as is until you have a handle on getting the chip working according to Hoyle. Or someone.
Anyway, have I created enough chaos for you or are there still places that still aren't quite there yet? :-)