Hehe I might be able to offer some help
As pairs robos do really really well but of course there is still the chance they will fight so you will need to bare in mind
However the lone robos are much easier to tame.
I wouldnt reccomend getting them from a pet shop for 2 reasons, one they are much harder to tame and two they can be prone to diabetes so getting well bred robos should slim the chances of it right down.
Cage wise weather they are pairs or singles get the biggest cage you can because they LOVE exploring so you will want to absolutely fill it with toys. The logs with holes in are great as are the cubes with holes in as they adore playing hide and seek
Tunnels, tubes, small climbing frames... anything that gets them up exploring and running will make them incredibly happy.
With pairs follow the usual rules of two wheels, two houses, two bottles, scatter feeding etc and you should be fine though I really reccomend getting a silent spinner or a really quiet wheel because they run on them for hours and hours in the night.
I have found that boys smell a little more than girls so I keep my Trevor in an open topped bin cage otherwise he sticks the room out but girls arent really smelly at all.
Investing in some small dwarf running balls is great especially if you can get hold of clear ones (ebay has them) as often when they are young they cant move the Syrian sized running balls. They dont tend to wake up that much in the day time is usually in the dead of night until early in the morning so it can mean having to get up really early to play with them - but of course all robos are different.
For food try and get something with low sugar content (eg Harry Hamster, Burgees etc) and avoid snacks that have honey in them like the fruit sticks/blocks. Stick to the different flavoured drops and fresh vegetables (never fruit). Scatter feeding is best with pairs and much more fun as they have to work for their food so hide it in toys and tubes too.
Lastly I would get a sand bath because they LOVE them! At one point I actually turned half of C&Ts cage into a sand bath but it was a nightmare to clean
Apart from that I cant think of anything else right now. Id add pictures but Ive put them all up on another thread so...
Good luck!