Congratulations on the pg Schmauskin, how far along are you? I have b/g dts who will be 2 on tues. I remember freaking out when I found I was carrying them, I posted on here and found the girls on the thread linked, they got me through the tough days, the rest I managed. I also have ds1 (5.11) and dd1 (4.3) and it can't be that bad as I also have ds3 (nearly 9mths).
You'll manage because you have to. Take all offers of help you can get and rest as much as possible. I had a student helper for a few mths through the local college and also a surestart volunteer when I moved earlier this year who's become a great friend.
Buggy wise we have a Jane Powertwin which was fab when the dts were little but I'm falling out of love with it the older they get. I love the Phil & Ted but only suitable after 6mths. I had a side by side to start with but just couldn't get anywhere with it.
As for the school run, it'll force you to leave the house which will be good for you and the dts and you will probably get loads of offers of help from the school mums.
I've never moved country but I relocated from London to Devon earlier this year (dh still works in London), and have moved house 3 times this year so I know how hard it is. Plan like mad and try to set up a support network before you leave if you can.
The early days were tough and I still have days when I struggle now, but I wouldn't change a thing. Having twins is a blessing. Come join us on the multiples thread linked, it's a bit quiet at the moment, but it'll pick up after everyone forgets about their families and get back to the thread the festivities are through.