Depends what remap you are going for..
if you are going for a mild map then you shouldn't need a FMIC but it's a good extra to buy..
I'd highly recomend upgrading disc's & Pads on any remap better to be safe than sorry is my way of thinking...
Or instead of a remap you can pay me £150 and I have a dragon chip, it just connects to the car (nice and easy) and more power... lol.. I had it on my 19 TDI Sport which was the first FR's... had no issues with it.. currently it's just sat in me garage waiting for Ebay.. lol
Altho all this does is make the car overfuel a bit to give more power so not brilliant for long term usage..