That cage looks just fine! I'd remove the wire shelves and replace them with flat wood shelves (maybe wrap some indoor / outdoor carpet around for grip, or notch the wood a bit), otherwise toes / claws might get stuck and ripped off. If you really want to get into it you could put some driftwood in place of the... wire wrapped pvc? for a "ramp", which might look nicer. Humidity should be a dream to keep up though!

Tubes are just nice because they cover more of the cage. If the holes are placed so that the UV is also over the basking, or close enough to it, the bulbs should be okay. Some UVB lights also give off UVA, but some don't. Heating / basking bulbs are essentially just high wattage light bulbs, so they won't give anything special. I'd just buy new UV bulbs if you got that cage as you don't know how old his are. Really good price overall, though.

You want a calcium : phosphorus ratio of about 2 : 1.

So far as gender goes... I still have no idea if Dibble is a boy or girl . Unless you want to try and get it probed or somesuch, you won't really know for sure until it either starts dropping eggs or sperm plugs. If I remember right they aren't sexually mature until about 3 years old, so you have awhile to work out how to handle either gender.