Hello,
Here is the code – http://prntscr.com/s9qr2a if this doesn’t suit your needs, let us know.
I can’t see the screenshot for question about tabs – http://prntscr.com/s9qrsf , please check.
If you want to remove quantity from the single product page, go to Edit product > Inventory > Sold individually.
Try to use a static block to create Mega menu – https://youtu.be/f07MBdnFPfk I can’t guide you further, because your screenshot not from our demo, sorry.
Isn’t it fine right now? Please provide URL and describe in more details the required changes, I will let you know if it’s possible.
For any new separate questions open up a new topic, do not add them in this one, because it causes a mess. Thanks in advance.
Regards