T2 and T3 are linked, its easy to walk from one to the other, just follow the signs. Is a fair distance, maybe a ten minute walk. Don't go outside if you can avoid it - 1) Horrible air quality and 2) its freezing this time of year!
T1 you have to get a bus to/from which takes about 20 minutes but is free.
There are atms all over, just have a look at the wall maps which are in English and Chinese. Bank Of China tends to have the best rate but for me in Guangzhou would only let me take out 2,500 RMB at a time whereas others let me take out 3000RMB. My visa card company charges me to withdraw cash so I'm a tight wad and notice these little details!
Pickpockets are everywhere, put your wallet in your pocket and keep your hand there too, or better yet, give it to your lady to take care of.