my two pennorth?
Litter training: if it is more than 8 weeks old (and I hope it is) it will already have worked it out for itself. However, on arrival and to be on the safe side, I would keep it in the same room as the litter tray until it shows it knows what it is for. If this is the bathroom, and you have the luxury of a separate toilet, that should not be a problem.
Food: I now use a mixture of both. My last cats were very old and were on Hills Science diet to control crystals in their urine, so it was dry all the way. Also, in Queensland, wet food was crawling with maggots when you got home, so was not an option. With my new kitties, I use wet food, with dry as something to stop the 3:00 am screamings for something to eat, it is less attractive to the dog also ...
Names, Well I have had several b&W cats, all with reasonably predictable names like sooty, and cinders, the latter because he had white sox, but black toes, so looked as if he had been digging in the cinders ...
Indoor/outdoor: If you can provide them with a safe indoor environment with lots of toys and an safe outdoor environment they can not leave, this is, in my opinion, the best option. If you let them out, then they should be brought in, ideally before dusk (as this is when most RTAs happen). And they should, IMO be kept inside at night. Not all posters on this forum will agree. But in Oz, there is the additional concern that most native wildlife is active at night, so more vulnerable to cats, and we care about that sort of thing. Here, I have no opinions.
As your friend is making this sort of enquiry now, I think she will have the capacity to adapt to the new kitty's needs. If not, we are always here to help, if not confuse her with our disparate views.