Hi Novie,
First, let me say that I'm sorry for your loss. Take your time going through everything in your shop. That's tough so don't push yourself. Hang in there.
Old Pfaffs are marvels of German engineering. I have a 332 which I believe is similar to yours except it has a convertible freearm. Does your machine have a little sliding door on the top? If so, then you have a built in camstack to make decorative stitches. If not, then disregard the information I'm giving about the decorative stitches. You can find a free user's manual here:
http://s2.vsmgroup.com/VSM/Pfaff/pfaffmanual.nsf/1fd5659e6f37141041256697003e64c0/477407f0a5b24a2f852575f30058e20e/$FILE/Pfaff%20261-262%20.PDF
Here is a supplement to the service manual:
http://tinymicros.com/mediawiki/imag...ice_Manual.pdf
There is a free yahoo group called oldpfaffpforum which has additional files, including the service manual as well as a printable version of the stitch wheel which you can print out and laminate and put together with a brad. It is used as a guide to tell you how to create the different decorative stitches. You can see what one looks like here:
http://www.ebay.com/itm/PFAFF-260-26...item2a3d98b46a
I'm pretty sure this is your bobbin case:
http://www.ebay.com/itm/BOBBIN-CASE-...item4d1d4907b1
Or you can get a bobbin case here:
http://www.sewingpartsonline.com/loo...ords=pfaff+262
The top should lift right off of your machine for cleaning and will snap back into place. You should see two belts (unless your machine has an external motor on the back as some do). When you clean or oil be very careful in not getting any oil or other liquid on these belts as they are cotton or nylon with metal cleats and liquids will make them fail quickly. The cleated belts are no longer made and difficult to come by, but I believe there is a remanufactured plastic (rubber?) version that will fit your machine (but double check before ever ordering that this is the correct one) is available here:
http://www.ebay.com/itm/MOTOR-BELT-7...item46101b198e
They are workhorses and yours should work for many more years.
Good luck and feel free to ask any more questions. Pictures are also always good.
John