Haven't heard of that university before. Actually lived there until a year ago. Which city will she be in?
ATMs are even more available there than in the US. The Broad Band system for the computer is lousy and expensive, you pay by the hour of usage, not like over here. You can purchase internet cards, just like you can purchase phone cards here for long distance and you just refill your account with it. AS far as cell phones, if she already has one that has a SIM card, chances are that she can just change out the card there and use the Thai system. You can buy phone cards there to refill your time, and it is probably the cheapest way to go.
If she is in Bangkok, there is a subway, as well as Skytrain system where you can buy trips by the individual trip, packages of trips, or a one month pass. Bottled water is used all over, do not drink the water in her home. It is okay to brush your teeth with but not for drinking.
Let me know where she will be and then I can give you more information. Hope that this helps.