No-one helped this chap out? Poor show.. I will begin:
Have a good look through the Mk5 maintenance section and this forum - will take you some time but is priceless

Keep your eyes out for corrosion under the arches/around the boot release flap, also a lot of TFSI engines known for oil consumption - generally accepted as "normal" for this engine but it still bothers me this day and age. Also a lot of imports of this model came into the country - not saying they are a bad but it's worth remembering you should be able to pick up an equivalent import cheaper. Just make sure they have 8 speakers and weren't stood in a field for a year before being registered in this country

Cupra is a cracking car but severely let down by its interior, IMO

BTW.. I've just spent a very good hour reading your Project Bora S3 thread.. sorry to see you're calling it a day
