You have come to the right place!
Ok, PF is very nice because it provide IR remote control of MOC, which is perfect IMO.
So, the parts you have provided are good, I would suggest you to buy smaller rechargeable battery box, it is more expensive, but smaller.
It goes this way:
-battery box
-IR receiver
-M Motor
Battery box has 6 AA batteries, IR receives signal from your remote and Motor provides power.
It is important that IR receiver has its sensor visible so it can receive signal properly.
With Speed Remote Control you can adjust speed of the M motor, it has 7 speeds one direction and 7 speeds in opposite direction..
I am not sure if you need 50cm extension wire, provided that your battery box will be at the bottom of the turbine, you have wire from IR, and wire from M motor, so calculate is this enough to reach the top of the turbine, without buying extension, you can save money there.
M motor is a little bit faster to connect it directly to wind turbine, but if you are using that new remote you can adjust speed.
But if it is still too fast and furious, use rubber band, pulley and reduce its speed by 3 or 5 times, according to your pulley choice.
But 7747 is pretty small, 33 cm tall, so it would not look very good with wires and motor being visible.
If you need more help about PF, ask