If you're looking to convert MBOX files from Google Takeout to PDF along with attachments, I recently wrote a detailed guide on this process. It covers all the steps and tools needed to make it seamless. Feel free to check it out on my blog.

https://www.cigatisolutions.com/blog/convert-google-takeout-to-pdf/

or directly convert your Google Takeout to PDF using Google Takeout Converter.