1 -
http://www.wilter.com/epicurus/.ppic...eroponics.html
2 - age of the cuttings? I don't understand. I simply snip a part off a 'mother' plant and use the aero system to get it rooted.
3 - hydro ferts, keep the N low or they'll take too long to root...and a rooting hormone (and/or B1) is always a good idea.
4 - I don't worry about the temp, it's just sitting on the floor in a bedroom, so it doesn't get too hot or cold.