Thank you for your interest in our products! The Rubbermaid FastTrack Garage Multi-Purpose Kit (15-Piece) does not have a hook for a wheelbarrow.
https://images.homedepot-static.com/catalog/pdfImages/53/53016307-2444-4c79-bd37-3a8762252693.pdf I would be very close to the edge of the stud. Manual shows hole pattern. I have mine mounted with one higher than the other, but I’d didn’t have space for two side by side anyway. So, there is a one stud overlap on mine.
It would require getting masonry screws separately to mount it - they are not included.
This system would be fine if attached properly to a cement wall. I would use anchor bolts secured with an epoxy glue made specifically for this application. You could also secure 2x4's with the same method above and screw the track to the 2x4's.
They count the three black plastic pieces on the track as three additional pieces. I actually like this product line they are pretty stout.
You don't need/use pegboard with this item
I put the bolts into studs. Used a stud finder.
It appears to be. I've had about a year with no issues.
Yes, but I didn't use them and the install went well, it has been a year now and everything is solid