How much yeast to 1 gallon of organic cider: 1/2 Packet of champagne yeast.

How long to let it ferment for that beer taste: about 4 days.

Once it is done fermenting do I need to do anything or just refrigerate it? YES! Remove the hard cider with a pump into another jug leaving the yeast cake at the bottom. Add some honey or brown sugar to back sweeten and cap tight.

Can I start another jug with the fermented apple juice as a starter? Yes!

Do I need to add yeast along the way while it ferments: No but there are some yeast feeders you can buy if you want to ferment for higher alcohol levels beyond a few days. Warning, the cider gets drier the longer you ferment.

Is putting it atop the refrigerator okay or should it be in my pantry? Cool dark place is best but refrigerator top is okay if it is cool.

Do I need to stir it or do anything else? NO! Just keep the cap ajar or better yet use a cork bubbler that lets gas out and keeps it water tight.