Whisks can be used to mix cakes, gravy, sauces, all kinds of stuff and even be used for a sifter by whipping floor, oh yes good for whipped cream. As for measuring cups and spoons, plastic works and are cheap.

As for temperature for baking there is tooth pick test. If nothing to the toothpicks it's done. My presses her finger on the top and if it bounces back done.

Me, I go by timer and smell because with gas stoves things can cook faster. They all have these swirling air ovens where things cook twice as fast.