1) Below is a list of all parts required for the LED headlight retrofit
FRM3 - 61359383692
ZGW - 61359322532
LED module for turn signal, left 63117352553
LED module for turn signal, right 63117352554
LED module for cornering light, left 63117352477
LED module for cornering light, right 63117352478
2 x LED display for fan, left 63117352479
2 x LED display for fan, right 63117352480
2 x LED main light module 63117354974
2 x Headlight control module, LED 63117409580
Headlight, LED technology, left 63117352481
Headlight with LED technology, right 63117352482
2) It will probably be cheaper to buy a used set of equipped headlights from ebay and the two modules (FRM and ZGW). Alternatively you could go with Umnitza's headlights, who look more or less the same, but aren't exactly the same as OEM
3) OEM LEDs are not plug'n'play on pre-LCI cars (2012 and 2013). You'll need some wiring harness modifications and coding. The Umnitza headlights are plug'n'play.