Those fixed French cups can be a PITA! Try using the 'big bolt' technique as shown in Sheldon's site and if that fails, get out a propane torch. I soaked mine in penetrating oil for days and really wrenched on it with a big bolt and nothing worked until the torch came out. It was only a few minutes work after that and the paint was unharmed.
As for the cotter pin, put something underneath to support the crank arm and axle, preferably something harder than soft wood, either very hard wood or metal and then whack the pin with a hammer. But remember - don't force it, use a bigger hammer