Gonna need:
Downpipe
Oil feed/return
Coolant feed/return
Air Intake pipe
Rods
New gaskets and bearings for engine while fitting rods which also means you might as well replace the rings
Bigger injectors (probably 550's from badger 5)
S3 maf or maybe bigger
Cupra r pump maaaaay be ok but would be safe to have a uprated pump
Custom fmic pipes I account for turbo bein in a different place
Etc