It doesn't stick.
You lay the foil over the baking sheet. You do this to protect your sheet and to make whatever you are baking easier to remove. If you have a non-stick coated sheet it may not be needed.
You could try parchment paper, a non-stick silicon mat, buttered baking sheet with a light coating of flour, or non-stick baking spray.
Yes, or else it'll stick to the pan.
You shouldn't, no. But it never hurts to spray it with a non-stick baking spray, anyway.
You can use oil, non-stick spray, grease, or butter to keep food from sticking on a pan or baking dish.
They used a baking tray, not a non stick one obviously it was just a one made out of metal! Or if it was quite big they would stick it in the oven/fire.
The coating on non-stick cookware is made from a liquid "paint" which contains PTFE (polytetrafluoroethlyene) fluoropolymer and sometimes other fluoropolymers. The final cookware coating is a dried, durable non-stick material which delivers the easy clean and non-stick performance that you expect from your cookware coated with Teflon® non-stick.
Most of the cookie sheet pans are made of anodized steel. Some of them have a non-stick surface, some don't. Another popular type of cookie sheet material is silicone. The silicone cookie sheets are non-stick and come in many bright colors and they are a little more expensive.
You don't really 'use' a baking dish. You can put food on it, tin foil, aluminum foil, non-stick spray, etc.
Usually the dull pan is coated with a non stick coating that looks dull
No need to use any spray or to grease the pan cookies come off easily. To add on the amswer: it is a non stick baking paper. it doesn't need liquids or any fat. When you bake foods you shouldn't use liquids and when you make pastry you shouldn't use any fat as butter or any kind of oil.
Yes, non-stick cooking sprays can be used on silicon baking pans, although food is less likely to stick to silicon than to other types of pans.