My first RepRap and i think i need some advice

Hello,
I got printed parts For Mendel Pursa, the same as shown in this guide:
[www.youtube.com]

I want to follow it to build my first RepRap, but i wanted to change extruder to this one:
[www.ebay.com]

Do you have any clues if this will work?
Do i need different electronics for this one?

no but you may need configure steps in the firmware and amps on the drivers for the motor. yours probably has a geared extruder that one is a direct drive

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Check my rubbish blog for my prusa i3

up and running
[3dimetech.blogspot.co.uk]

Even if i still don't have electronics? Just the plastic parts?
Tomorrow i'm going to go buy rods, and i tought if i may do some modifications to get newest extruder/electronics to work it would be worth a shot.

So which model does THIS [www.ebay.com] extruder works with?

Or maybe you'll give me some advice which extruder/ electronics i should use for my first printer?