Hello Cesar,
Thanks for reaching out! Let me try to answer your questions.
1. Unfortunately that feature is not available straight out of the box.
I recommend you take a look at this extension:
https://theeventscalendar.com/extensions/view-print-download-pdf-tickets/
While this doesn’t attach the ticket as a pdf it will add a link to the email where users can download the PDF version.
Note that it will not add the download link to the frontend my orders page.
2. You can modify the email layout if you do a template override. I suggest our Themer’s Guide to get started on that.
You will need to create an override for this file:
wp-content\plugins\event-tickets\src\views\tickets\email.php
I hope this can get you started. Let me know if you have further questions.
Cheers,
Andras