We just sold our Tornado after 7 happy years, and there are other Tornado owners/sailors both on the open forum and here. In addition, there is the TornadoCat e-mail list on
http://groups.yahoo.com/group/TornadoCat/I definately reccommend you to join on the TornadoCat list! It is free..
Equipment for a gennaker.. Bowsprit, snuffer, selftacker, some blocks and autoratchets and the sail of course. Track down any olympic teams and ask what they can sell you. If you are in Greece, you have an excellent olympic Tornado team. If that does not lead anywhere, you can use most F-18 gear or in a pinch build it yourself. Just read up on the class rules first so you know where the limits are.
Easy to recover? If it is windy enough to capsize you should be OK unless you are very lightweight. Just make sure your mast is waterproof from at least the boom and up. When we have capsized, it has been windy enough to right the boat by just pulling on the dolphin striker. But this depends on your crew weight. Using a righting line or at least having it installed is a smart move. If you worry about it, go out and do some test capsizes with a boat to assist you before you go out on your own.
There is no spart parts manual as there are so many different setups. There are some good information on:
http://www.funcat-sailing.de/index0.htm but if you have questions about "best practice", just ask. If you want as many answers as possible, do it on the open forum.
Good luck with your boat! The Tornado is an excellent design, even today.