What you really need to do is try and find a CD drive for it, and try to get a freash install of windows on it. Preferably 98SE, but even 95 would help out. I bet anything that thing is loaded down with years of crap that's really messing things up.
After that, if you can get the info from the ISP, getting on the net shouldn't be too hard. Just enter the info into TCP/IP and it should connect no prob. Email...you should have outlook on there.
I beleive all windows after 3.1 had some version of IE on them...just look around. If you REALLY can't find it, there was a site called oldversions.com, or something like that that had some of the original versions of software. Maybe you could find Netscape 3 or 4.