so what ever you are baking doesn't stick to the pan.
Yes, just grease the tin really well.
You need to grease the cake tin because otherwise the cake will stick to the tin and you wont be able to remove it whole.
The function of baking tin is to put the cooking material in it and then help the material to bake.
A baking pan that has been greased. Crisco shortening and a tin is I believe an English term for a baking pan.
For most things no its not worth it, just use a bit of trial and error. Most things don't need specific greasing, but occasionally you get something that has the adhesive properties of superglue, then grease the tin next time. (all the crispy bits will slide off after a good soak)
yes you do
It helps keep out moisture.
Cooking oil or butter.
No, do not decrease the baking time when using a disposable tin. But as always, watch the cake and test for doneness when the edges pull away from the sides of the tin.
The "inside" of tin foil is the dull side. The "outside" of tin foil is the shiny side.
You can use a silicon baking dish therefore no grease proof paper required. Apart from this, well butter the inside of the tin, get a small amount of flour and dust the inside of the tin with it. This should stop the mixture from sticking.