Ford: clutch, clutch fluid, resevoir

Question
i have a 2000 f-150 v-6 extended cab (has the small doors that open in the opposite direction of the regular doors).

my clutch has stopped working. I can change gears while the engine is off, but can't put it in or out of gear while the engine is running. if i crank the truck while it's in first gear, it pulls forward as if i'm not holding the clutch down at all.

i checked the clutch fluid resevoir and it was dry. i added fluid, but i don't know what to do next. can you help?

Answer
dana fill up the fluid and  go under the truck and look at your slave cyl. you will see a bleader screw loosen this and wait till you see fluid then close it .Have someone pump the padal  slow and and someone bleed it. if it is leaking inside then you have to remove the trans  to replace it and then if you do that then you might as well replace the clutch set up.