Many file formats work in both Linux and Windows. Plain text files work of course, with the exception that (unless the reading program is "clever") Windows and Linux use different kinds of newline markings, so if you save a multiline textfile under Linux, Windows may only show blank boxes where it should switch to a new line, and vice versa (you may use programs like "dos2unix" or "todos" that can convert between the two formats, if it doesn't work elseway). PDFs work of course, and with OpenOffice you can read/write MS Office files. And so on. Actually it's not up to the OS at all, just up to you - do you have a program to read the files (mostly you do)?
First find out what your network card vendor and model/chipset is. Then head here or search the web for more instructions if you find that the network tools of SuSE can't get it running. In most cases it should be as easy as plugging the cable in, but sometimes you need a bit more work. To find out the type of the card, use SuSE's control center (YaST) - I'm pretty sure it has somekind of "hardware manager" that can tell more - or read trough stuff like
that contains useful information (though it's a bit difficult to read).
A good practise is to mention every possibly useful fact about your hardware (or software for that matter, if needed) in your first post to a thread. That way people can easily check what it is all about.