Answer 1: As you make the payment, you will get a link to download. In this you will get the template (to make model) and assembly instruction.
Answer 2: As on now, this service is available only in India. consider. pl visit https://www.seemacraft.com/category/77645/paper-craft-models-printed-copy/
Answer 3:NO, the models are copy right protected. You can only make for decoration in your Home / Office or 1-2 copies for free gift to friends and relatives
Answer 4:The instructions are complete to make the model, however the sale is not eligible for return. All support through e-mail will be provided. Do not worry. We will support you till the model is completed.
Answer 5:By changing Print %, you will be able to change size to some extent, but texture change will be difficult. As a copy right, even after changes, you are not authorized to use for commercial purpose. pl visit "On Demand section of http://www.papercrfatmodel.com for more details.