In reply to John Clinch (Ampthill):
torch - there aren't any tunnels on these ones, so no. Maybe for emergency purposes if your phone has no light.
route description - deffo. The topos on bergsteigen.com are excellent and free to download as pdfs.
http://www.bergsteigen.com/klettersteig/trentino-suedtirol/dolomiten/rotwan...
long trousers - depends on weather.
long sleeve base layer - yes, stops your waterproof sticking to your arms if it's wet and warm and stops sunburn if it's not.
synthetic warm jacket - yes, if you're out the sun and in the wind it will be cold. Most of the routes are on the north side of the Rotwand and shady.
light water proof - deffo
1.5 litres water - use multiple bottles, one in a easy-access pocket to drink from, the others in the pack to not fall out when you scrape down a chimney.
lunch, snacks/spare food - yes, you'll be on it a good while. There are huts for a beer at start and end though.
fingerless gloves - deffo, running your hand into a spiky end of wire is no fun. It's also easier to move up VF ground if you slide your hand up the wire with your krab on top of it, saves reaching down for the krab all the time you want to unclip.
harness, via Ferrata kit, helmet - of course
phone - yes
first aid kit - electrician's tape and tissues, maybe a crepe bandage and field dressing.
watch - maybe not if your phone tells the time - you'll bash it a lot.
Would you carry more water than that? - no, but you know how much you get through so it's your choice.
Would you carry bivi bag/ group shelter in case of emergency or benightment? - no, because I don't own one, but it's probably a good idea. You won't get benighted unless you're in proper trouble or start after teatime (and you don't want to be up there after 3pm for thunderstorm avoidance purposes).
Is that enough clothing? What about warmer gloves and or water proof trousers extra fleece? - only the waterproofs. You'll be moving all the time apart from lunch so a baselayer, fleece and waterproof will be warm enough. It's a '1/2 day' ferrata accessed from the valley so you know what the weather will be doing with fair certainty, and you're not going to start it in the rain.
Would you have a proper map? - yes, useful for identifying other peaks and the way down - many ferrata meander through spires and gullies and it's easy to get disorientated (especially in mist). Sometimes the path you want has been washed away by a rockfall or storm so you need to know what alternatives exist on the fly. Simple map here
http://www.paolina-huette.com/paolina/index.php?lang=en&Itemid=566
Other things to take - camera, and walking pole(s) - the Vajolonpass descent is a massive scree gully on the south side of the Rotwand and poles are useful there. As mentioned above, sunglasses are useful to prevent 'snow blindness' from the white rock - one of my partners suffered this once (although there was some snow on the route, not just pure rock).
What not to take - camelback, purely because it's easy to rip the bitevalve off and lose all your water, and you don't know how much you're drinking. On these particular routes - a GPS, the navigation is simple.
The routes you've chosen are a great introduction - they were my first routes
. Kesselkogel close by is also nice and a 3000m summit to boot, although the approach / descent is quite long (we went up from Rif. Gardecchia via Scalette path). Santnerpass is also fine, but has a snow couloir - probably no problem at that time of year this year. You could probably combine them and stay up in a hut overnight.