It of course is known as the Teutonen-Löffel but very helpful it is
In Italy, you generally take vinegar and olive oil with the salad. The so called "Italian Dressing" obviously is an invention of some "gastronomes" who had to counter the variety of other sauces available in the world. But when I have green salad at home, I use vinegar, olive oil and soy sauce
Yes, which is the same as in Italy and here (oil and vinegar).
Only variations are the types of oils and vinegars.
Tom