On this page of the Resident Evil Village guide, you will find a list of all the files available in the prologue - in Ethan and Mia's house. The list will help you explore the locations from the prologue in 100%.
Important note - Get all the collectibles from the house before you return to Mia after making Rose go to sleep. The action advances further when you are talking to Mia in the kitchen. You won't be able to return to the location from the prologue.
Old News Clipping
The newspaper lies on the desk next to the lamp.
The note is attached to the refrigerator in the kitchen.
The diary is electronic, and you can read it by interacting with Ethan's laptop on the floor.
Medical Checkup Report
The medical report lies on one of the pieces of furniture on the first floor.