I just bought this Peugeot and having a hard time finding out what year and model it is. Can you please assist and help me. I think the third pic is the serial number: Y71241711.
As noted by @AndrewHenle this appears to be a 1987 or 1988 Peugeot Aubisque; it's a very good match for this (identified as) 1988 catalogue image from http://www.peugeotshow.com/:
I had previously found a less clear copy of the same catalogue at www.bikeboompeugeot.com where it was identified as a 1987 catalogue. The 1989 catalogue has an Aubisque with a slightly different paint job.