Second hand or new car?

Can't see how the lack of a kit can be classed as dangerous. No doubt the kit was removed by the previous owner who fancied keeping the pump and the bottle of gunk was likely out of date anyway. Buy yourself a new one or, as suggested, a space saver tyre kit if there is room.

Assume this is a second hand vehicle. Personally I'd have checked the spare wheel etc when viewing the vehicle with a view to securing a spare or space saver as part of the deal.

Unless there's a legality in play requiring a vehicle to be sold with some means of repairing a puncture then you've got limited leverage if the kit was absent at the time you agreed purchase. If you're lucky the dealer (are they a VW franchise?) will supply one as goodwill. If they're a 'car retailer' selling on monthly cost less so.

I've little faith in repair kits. See too many cars at the roadside on three wheels and a jack where the wheel has presumably been carted off for a new tyre. IIRC the breakdown services carry a set of 'universal' spares to get you moving in this scenario.

Best route is to buy the appropriate wheel/tyre, either space saver or full size, together with a jack.