Kavod harav, am I allowed to benefit (selling) from neveala meat, treafa and hazier?

Kavod harav can a person WORK In a wine store and sell as a cashier NOT OWN THE WINE? (Not kosher, and the owner of the wine is a goy.)

I have a shaila, I’m hosting dinner tonight but we haven’t toiveled all our bowls yet, and we don’t have enough plastic ones. Can I use them anyway or I am not allowed?

Kavod HaRav, can one give/sell non-Kemach Yashan products to a jew?