I suspect she is still highly stressed after the move. They say it takes around three days to decompress, three weeks to learn the routine, three months to feel at home. Some dogs take longer.
A stressed animal won't eat treats so if you can give her a bit of time, she may well come round.
I also recommend to people that rather than giving a treat to a dog like this, for a little while they toss the treat away from them, past the dog, so that the dog has to move further away to get it. This does two things. First, it starts to develop something called a positive conditioned emotional response (Google +CER if you want to read more) and she learns that the person who has the treats is a good thing. Second it avoids the dog having to feel conflicted, which is what happens if she really wants the treat but has to approach the person she doesn't trust (yet) to get it. This will probably just take a few days, then try putting one near you. See what she does - if she darts in, takes it and retreats, she isn't ready for that yet so stay at step one for longer. When she eats it in place, do that for a few days then try offering one from your hand. Again watch her reaction to assess whether she is ready or whether you need to stay longer at step 2.
For the toilet training, try not to put pressure on her for now. You are right we would normally suggest a sausage party for successful toilets but for this dog, for now, maybe a warm ”goooood girl”. Obviously don't scold or react to indoor toilets, the last thing you want is for her to be nervous about your reaction. Can she be contained in an easy to clean area for now?
If she hasn't been toilet trained she has probably never had to develop any control over her bowel and bladder, she will need to develop that muscle control. So, step one is to take her out more often than she needs. Once she is taking treats from you (and I suspect in a week or two, after the tossing away technique, she will realise you are An OK Person and that frankfurter sausage is A Good Thing) generously reward outside toilets. The idea is to make her really want to hold her toilet so that she can earn her reward. Give the reward immediately so it is clearly for toileting and not for anything else. At the same time, make a mental note of how long it is between her normal toilets. At first, try to have her outdoors for every toilet so that you are setting her up for success and so that you get the opportunity to teach her how awesome you think outdoor toilets are. But - after a few weeks of this, depending how fast she progresses, try asking her to hold by delaying taking her out by just 5 minutes longer than her normal toileting interval. If she has got the idea that outdoor toilets = sausage and indoor toilets = nothing, she will try to hold. But don't stretch it by too much, you don't want her to fail and have an accident. Gradually keep asking for a little more time, as her control develops.
It sounds a little daunting but it really is worth investing the time and effort into her now.
And if you wanted to post some pictures once she is more settled, we won't complain!