The amount of sugar varies depending on the recipe, what kind of yeast you're using and what kind of cider you want.
Since it's your first time, I'd say use two or three cups of sugar...take a 1/2 gallon of apple juice and warm it up on the stove in a sanitized pot just warm enough to dissolve the sugar in,
don't boil it, just warm, then add that to your fermenter. Pour the rest of the juice on top of it (don't be afraid to get it shook up, air in it at this point is ok, just not later.
Make sure you sanitize the bottle, the plug, and the airlock, and the funnel you use to get the juice in the jug if you use any. You can either do this with a no rinse sanitizer like star san or idophor (Iodine solution) or by boiling them (harder to do with the jug
). Pour the yeast right on top of the juice and let sit for at least two weeks. You'll see the bubbling slow to next to nothing.
During this next two weeks you might want to look into getting a hydrometer. It will be too late to help you get a rough ABV percentage, but will help you determine that fermentation has stopped. You want to make sure fermentation has stopped so it can be controlled when you bottle, otherwise your bottles my blow up and you have a mess to clean and no cider to drink while you do it.
Also you will need to think of weather you want sparkling or still cider. As a first timer, I'd suggest you try both so that you can later know which you prefer with the recipe you used. Put a 1/2 teaspoon of white sugar in every 12 oz. bottle you want sparkling, and don't put any sugar in the bottles you want to be still cider. Let the sparkling ones sit alone for at least two weeks.
Always sanitize your bottles and caps as well as your bottling bucket and siphon...oh yeah (don't know how newbie you are or how much research you did before) but NEVER pour the cider out, you need to siphon it off the cake of yeast sludge that will develop at the bottom of the jug.