Since there is no Office for tablets except for that Windows 8 RT thing (please ignore that thing) you are going to discover that this is a media consumption, email, web browsing nice thing and not a replacement for laptops and such.
Maybe someday but beware those that tell you can schlep your files over and open them. Some do open in Pages (https://discussions.apple.com/thread/2693956?start=0&tstart=0 for example. plenty of discussions about that.)
You may wonder why the Word documents get so screwed up so let's tell why now. It's very simple. Word formats a document based on the printer you have installed. The iPad has no printer drivers so how to render a document without metrics from the printer? You see the problem now.