NO. -You buy special drill tipped screws for it at the same places you get steel studs.
Vapour barrier is directly onto studs.
The best type of glue for drywall installation is drywall adhesive, also known as drywall compound or joint compound.
The recommended type of screws to use for attaching drywall to metal studs are self-drilling drywall screws.
Coarse drywall screws have deeper threads and are used for attaching drywall to wood studs, while fine drywall screws have finer threads and are used for attaching drywall to metal studs.
The standard spacing for drywall studs in a residential construction project is typically 16 inches on center.
There is no drywall glue. -If you are referring to mud (drywall compound), you scrape the lumps off at the end of each day and then wash your clothes. It always comes off.
If is an exterior wall, insulation, otherwise bare studs walls are fine.
If you drywall on 16" on-centre studs, with sheet length perpendicular to the studs, and screw the two outside length edges at 6" spacing (as it should be) and the two interior studs at 12" spacing, the answer is 48 drywall screws per 4'x8' sheet.
To hang on drywall securely and safely, use anchors or screws designed for drywall. Locate studs for heavier items. Use a stud finder to locate studs, then use screws or nails to hang items securely. Avoid hanging heavy items on just drywall alone.
It shouldn't be a problem. The glue is water based and the mud should adhere to it.
That is the thickness of the studs, -the inside of the wall.