You will receive the step-by-step PDF instructions and XML parts list files in an email. The XML file's contents can be uploaded to a Bricklink.com Wanted List to make it easier to find the pieces you'll need. Two PNG Files are also included so you can create custom stickers/print of the "Mrs. Lovett's" and "Meat Pies" signs.
You can download the XML files here so you can check how many pieces you may have already before getting the instructions. If you're unsure how to upload an XML file to Bricklink, check out this short guide here. Please note that minifigures are not included in the parts list.
Thanks for your support, and you can contact me at email@example.com with any questions!