Here is Ricks diagram from the Bedini Monopole3 Forums. I suggest you also join there as others may have asked the same questions.

There are a number of variations to the theme, you can opt to tie all coils together in series and run off one transistor (this would reqire bifilar winding) or series opposite coils and use one set for trigger and the other for power, which is probably easier. Try about 500 turns of a fine gauge (30awg -34 awg?) or count turns until the core is full. Bigger fan will be easier to wind, and make sure all windings are wound the same way.

There are variations of this circuit employing a SCR and cap, but stick to the basics until you have it running. You can fabricate your own from scratch (see this vid I made for an example YouTube - pulse motor) but the fan is a good idea because everything is prefab'd and will be alot more accurate.