I'll start with the information you get from the page:
Product features:
Operating system: Microsoft Windows 10 | 11
Language: English
Includes: 1 Installation Guide, 1 Download link
Availability: After confirming your purchase
Manufacturer: image sounds
Category: Audio

More Information:
Ultimate Song Collection

The Ultimate Song Collection gives you over 20 GB of royalty-free music, featuring 571 high-quality tracks across 50 themed compilations. 
Find the perfect soundtrack for any project, from pop and classical to epic scores.

- How many songs and their genres?
Between 10 and 12 in each genres.

- Are the songs editable i.e. are they laid out like in a DAW e.g. can l edit them in Acid Pro?
No, All tracks are in wav format. The instruments are not split into tracks or instruments if that's what you're thinking of. In my opinion, the music is actually quite good, but despite that you can easily add drums in the DAW since some of the melodies could use a little extra spice to make it even better and more personalized, but you are also free to extract the instruments from the melodies with an AI and then adjust the music as you wish in a DAW.

- Are the songs royalty-free as they are, and can l sell them without paying Magix royalties if l edit them and make them my own?
From my understanding: As long as the music is part of a larger project or the music is just a smaller part of the project, you can do whatever you want. This means, as I understand it, that the unedited music must not be the focus of your project, i.e. the primary product. It must be edited or it must be part of a video where the music is simply background or to set a mood.

I hope this helps.