Coriander seeds?!
Answers: Do I need to heat the coriander seeds in a pan before grinding them.
Toasting them brings out the flavour and the oils. You want to watch them carefully while toasting over a low heat. You don't want them to turn colors you just want them to smell more intense. Cool for a few minutes before grinding
almost burn them first
No. They are often one of the ingredients in pepper potpourri.
You should toast them over medium-low heat until they smell very strongly - don't walk away from them and keep the pan moving, because its very easy to burn the seeds. They'll smell and taste much more powerfully because of the toasting.
Yup, dry roast them, it'll intensify the flavour (which is lost over time, as they sit on the shelf).
Yes. You have to remove all traces of moisture by dry roasting them on a griddle or pan and stirring it constantly till they give off aroma. Don't let them burn though. Cool them before grinding.
Just lightly roast them and cool before grinding them.
Dry fry them and when they just start to pop remove from heat, cool and grind.
I would not burn them, they will be bitter. Toss them lightly till they start to change colour and then grind them.