You can probably use toggle bolts but I would be wary of just anything and would want something like this that is rated for carrying some weight.
No idea how it's done in .ca (here you would almost always find concrete blocks that would be easy enough to drill rather than poured which is a PITA) but anyway, around here folks usually use furring strips which I personally would drill into for extra support if you do decide to go with toggle bolts. I also wouldn't trust just screwing into furring strips as the metal is generally fairly light gauge compared to metal framing studs.
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I don't know how different kinds of apartment buildings are constructed. More information would help.
No idea how it's done in .ca (here you would almost always find concrete blocks that would be easy enough to drill rather than poured which is a PITA) but anyway, around here folks usually use furring strips which I personally would drill into for extra support if you do decide to go with toggle bolts. I also wouldn't trust just screwing into furring strips as the metal is generally fairly light gauge compared to metal framing studs.