durablity and brand?
You'd probably get a good information by looking at the components.  Assuming the components are original, you can tell a lot information about the general quality of the frame from the quality components. Almost nobody is putting DuraAce on a cheap Walmart frame, and almost nobody is putting Tourney parts on a Cervello.  The bolt on wheels and ProMax crank lead to me believe that this bike is more likely from Walmart or another department store. That doesn't mean it is, but it could be.  Also, it has V-Brakes, which most quality full suspension bikes don't use any more. They've almost entirely switched over to disk brakes at the high end.  Get some more pictures showing close ups of the derailleurs, crankset, suspension, and the markings on the rim of the wheel to help us evaluate it further.