My dts are nearly a year old. I used tommee tippee closer to nature bottles (on the advice of someone who I later found out never used a bottle with their baby!). I think they are ok, but generally Avent seem to be more popular.
I hired Medela symphony breast pump via hospital to get milk going, and mix fed for 6 weeks.
Get plenty of bottles - min. 6 per baby. Buy extra, you can always use them if you need to, or take them back if you don't.
Also get 2-3 of the "wedge" powder portion pots, to help for night feeds.
You can get powder and liquid feeds. I would suggest having a long browse in your local supermarket, to get info, and if you go on the manufacturers website, you can also get advise (but you do have to "sign" disclaimer about breast is best etc)
Wide neck bottles are easier to fill.
Nobody knows about having twins until you have them, so try and ignore NCT. Have you got a twins club local to you? You may find them more supportive, and more sympathetic towards twin mummies and will have loads of great ideas.