I got mine in 2015 and it is a 2015 model. 35,000 KM driven only in Pakistan as when I got it imported, it read 8 KMs on the odo. Hence it was brand new.
Yes, if the fluid is white or has residue (textured like grease), it should be changed right away.
I got the fluids replaced from Honda Center Rawalpindi. A 500ml of Mobil1 DOT4 costed me Rs900 which I bought separately from Mobil Auto Spa infront of Kohi-Noor mills. You can google the location.
I am not sure about the replacement charges as I am friends with the owner of Honda Center and they did not charge me.