Hi you’ll need all lines for the turbo,manifold downpipe,turbo intake and boost piping to start with.
Your Aux inlet is the other way round then the Bam the k04 came off so you need to figure out how you are going to route the piping. The k04 came with different injectors from the 225bhp 1.8t I looked into it about 10 years ago but with the advances in technology now it’ll be more cost effective to by a hybrid turbo that bolts into your factory location for you can still use your pipe work.
Something like beach buggy turbo k300 is idle if people are still using these I’m not sure as I’ve been out of the 1.8t for years despite still owning one. I’m more focused on the 2.0t now.