Yep, you'll need the calipers
and carriers from the TT (or others, mine were from an S3 but I think Mk1 Octavia VRS is the same except they're green)
Then 312mm disks and matching pads (I bought both for a mk1 Octavia VRS as they were slightly cheaper than for the TT...)
You can probably reuse the existing brake hoses, they're supposed to be long enough,
just...
But I bought TT ones to make sure as they're longer - seemed to make sense rather than rely on 10+ year old hoses