Finds and info needed

Well it's been awhile and things have slow. One of my finds yesterday was AT&T UNIX PC with KB and mouse. Unit powers up find but then wants a logon id and password, I got the unit at Goodwill for $30 so no manuals or other information about it. My question is to anyone out there is there a way to break this protection so that I can get to the harddrive ? This week I also picked up a LISA with KB and mouse for $15 and it loaded with a OS LISA and will be installing them so I hope. I picked a large qty of computers, printers, and other items that do not meet the 10 year requirement yet but someday will and the prices were too low to pass on, so I will not list them here yet. Some of the computers in that lot were MAC Plus's, mice, and KB but I have not tested them yet. Got a TRS-80 model 100 that works but has one missing key that broken off so the guy gave me the unit for free. Got something called a Tektronix 4211 with kB and mouse for $5 (someone else got the 19" monitor for it) does anyone know what this is ?? Also a Pulse Generator Datron SPG2000 unit anyone know this one ?? A VTECH model L-128PS unit seems to work need to find more info on this one too. A Apple Peronal Laserwriter NT for $5 but it needs some work powers on but will not print anything ? A Hitachi CD-rom model CDR-1700S no way to test this baby yet (it was free). A Laser128 $5 not tested yet, a HP ThinkJet model 2225C not test yet free, Zenith model ZFA-138-42 free and not tested yet. Last was a HP 1727A Oscilloscope with manual that works for $5. I end here as I could write book, I hope to have my web site up in January there you can see my collection. Keep Computing.