If you hover over the 009 on the part listing it'll give you a brief summary of what it is. My guess is ABS but without an
ePER to hand i cant say exactly.
I doubt you'll ever need to change the drum brakes, it'll probably be sold by the time they do. Rear brakes hardly ever wear that quickly. My Bravo is 2 year old with genuine fiat pads on the front and still are only 3/4 full from fitting them. As mentioned 90% of the braking is done with the front.
Again fitting bigger discs to the front is not required and will give marginal gains, nobody will notice nor is it worth doing. Your better off giving the car more styling mods, i.e some sideskirts and spoiler, maybe a remap and a new clutch.
I think your spending alot of time and money on useless things that in the end wont benefit you at all. Again coupe alloys are 15's and will still cover most of your brakes.
Dont forget tinkering with the brakes means you need to declare everything to your insurance company which may increase your premium.
If you do go ahead with it, goodluck and be careful. If you have kids then make sure you are not playing with there lives changing the brakes around when they are perfectly safe and secure as they are. Same applies to anyone doing any brake conversions.