Oh I love toasted pumpkin seeds!
The way I make them is to wash them well, then pat dry to absorb the liquid.
I spread them out on a cookie sheet and put a bit of oil on them. Not lots but enough to coat them so they do not stick. I sprinkle seasonings on them (usually season salt, but I did try barbeque seasoning once!)
Bake at about 250 for 1 to 2 hours. You will hear them popping when they are cl0ose to ready. Stir them every so often so they do not burn!