Two questions if anyone could kindly point me in the right direction.
Q1. Can you set a document so the previous box has to be filled out befor you can move onto the next?
Q2. Can i add a box / button on the end on the document once it has been completed that will sent straight to an email address?
Q1: not possible
1. It's actually possible, but a very bad idea. A better way is to define the fields as required, to make sure they are filled in before being submitted.
2. Depends on what you mean by "straight"... If you mean without any user interaction, then no. What you can do is submit the form (or the form data) to a web-server, instead of doing it via email. If you use email the user will have to set up an email account and press Send on the generated draft for it to be sent. If you use the web-server approach they will only need to approve sending the data, and the rest will be done on the server-side. It requires a more advanced setup, though, including the server-side application to receive and then handle the data.