I would like to use Minion Pro for my eBook. Are the faux versions of the fonts the ones created by Microsoft Word using the italics and bold buttons? I have no idea about it, just wanted to know if there are any differences, thanks.
Yes, the "faux" options are the ones created on the fly by MSword from the regular font. It's considered ugly, because these are just slanted versions of the regular font.
That said, Minion pro is part of Adobe font (it's a font created by Adobe for starters!)
https://fonts.adobe.com/fonts/minion
So no problem with licencing these for ebooks if you have a running adobe subscription. All the variations are included, so no worries to licence all the variations.
If you are not in an Adobe subscription of any sort, then you need to contact Adobe originals directly or read their specific policies on their website, if available
https://www.adobe.com/products/type.html
and more specifically
https://www.adobe.com/products/type/fonts-by-adobe.html