For me these disks look original as they look same as mine after 11 years . 90% of these groves are caused by heat with is generated by braking over many years . 10% would be caused by pads and stones that could get trapped between .
I just like the avant shape. Q5 is a nice car but i just dont get the idea of the sq5, sporty suv ???!!! It dosent make sense to me . If it was me i woukd go for a6 avant
Hardwire kit is sold seperatly unless they have some kind of promotion i dont know about
http://www.halfords.com/technology/dash-cams/dash-cams/nextbase-dash-cam-312gw
http://www.halfords.com/technology/dash-cams/dash-cam-accessories/nextbase-dash-cam-hardwire-kit