2, the basic function is the same, you can look at the top of the furnace cavity, are there two halogen lamps on it? This is something heated by light waves, just like an ordinary oven and similar to something heated by an electric heater.
3, no, if you need to flip the lid, you should turn it off first, then turn it on, and then turn it on. In addition, I remember the barbecue grill that the beauty gave the grilled fish and roast chicken, and the effect was not very good.
4. Again, the microwave oven has no barbecue function. As for chicken, fish and the like, barbecue combination is recommended. As for the specific use, it depends on the crispness of the food you need, and there should be instructions in the manual. When you make a cake, you use barbecue. If you use microwaves, it is estimated that there is nothing.
It seems that you can make cookies. You can search online specifically.