"minimum" salary for living in Bratislava ?

If your really afternoon the minimum you'll need to rent 20-30 mind away by trám from the city center in Karlova ves or in Dúbravka or ever further back down that láme. Cheap Single bedroom appartment goes for 380€ or so a Month, which covers utilities and internet.
Daily lunch menu in an average slovak restaurant is 4€ for lunch. Huge meals which are nice.
Trám to the city from these suburbs will cost u under 2€, if i remember correctly.

Ull propably also need a job there are many international companies in the center

Hope this gives u an idea!

It all depends on what you imagine under decent living. I would say 1000 is the minimum to live normally, but some people live from 500 (don't ask me how).

Thank you