Hi- first congratulations on your new piggies and
for going with Rescue. They will be a bit bewildered, they've had a lot of changes .
Have they always been cagemates or were they bonded in Rescue?
We have (present Roll Call) GP4 (my DDs lardy tricolour sow) GP5 (my tiny feisty arsey little Himalayan sow) - both Rescues ex-breeders before they came to us and GP6 (our new neutered boar, from the same Rescue. He's DDs pig, very sweet,laid back boy).
Previously we had GP1 and GP2 (rescued brothers) then GP2 died we got GP3 (boar piglet) to match with GP1. When GP1 died we had GP3 neutered and got the sows. Sadly GP3 died in January and we had no boars until GP6.
Ours live in a wooden Playhouse with some adaption .
We clean the haybox (glorified garden storage trunk for cushions etc, with 2 doors cut out) every day. Theres a layer of newspaper and hay that I roll up and replace with fresh each night. Under the hay is a good layer of small animal friendly wooden cat pellets to absorb. That lasts a week with spot cleaning. The sows pee far more than our boars ever did.
The main floor lasts a week.
In winter I use a thick layer of equine bedding (chopped card) on the floor. Or this year, if I have enough, my own shredded card/paper 
We feed morning/night (veg). Pellets and fresh water at night.
Cuddle in the evening.
Run when it's nice enough, they had four hours on Sunday but the grazing days are getting fewer now sadly)
Lots of playthings- boxes,tunnels,paperbags. Make sure you remove staples, tape,handles.
They chew everything and everything 
They should be warm enough in the hay but once it gets chilly you might want a Snugglepad or similar (it's a solid microwaveable plastic disc that goes in their bedding. ) I wrap in fresh newspaper each day, mine peed the cover too much.
We bring ours in at night for Guy Fawkes (noise) then play it by ear in November/early December . When they sleep in at winter they have the small junk storage room which isn't kept warm. I put a duvet over the cage to insulate them and keep them quiet.we fill the cage with hay.
You'll find yourself in the supermarket or the outdoor market buying veg for them. Especially if it's something new (Waitrose is brilliant for this, lots of reductions too) .
I;m always picking up veg and thinking "Hmm, wonder if the pigs would like this". 