What a great friend to give you such a wonderful machine!
I purchased a 930 new in 1983. It has the needle up/down when you heal back on the foot pedal. Bernina had a special offer when you bought the machine you got the sewing cabinet free. I have the cabinet as well. It's a nice cabinet. I used my machine hard & the only part ever replaced were the feed dogs. I wore them off I sewed so much!
The 930 makes a sort of clicking sound when starting & stopping. This machine has always been in great demand, as it is one of the last all medal, non-computer, machines made by Bernina. I'ts a workhorse. It's considered a semi-industrial. It will sew thru 3 or 4 layers of saddle leather without blinking! I'd highly suggest you find a Bernina dealer & have it cleaned/serviced. Then keep it well oiled & she'll run like a dream. Also you should only use Bernina oil on this machine, as it's different than Singer or generic oil.
If you didn't get the manual with it you can go to Bernina site & download a copy, as it's no longer in print:
http://www.berninausa.com/news_detai...i2238-sUS.html
The machine did not come with a walking foot. The foot price for a new one is around $100(or more) from a Bernina dealer. There are generic feet, but I do NOT reccomend them. The original walking foot came with 2 sole plates. A newly designed one, which is just comming out, now comes with 3 sole plates. 1 is for regular sewing, the other 2 are for quilting. The 2nd one (new sole plate) for quilting has a guide for doing stich in the ditch. The new walking foot has been redesigned just a bit so it will work with the new 830 & 830E machine that have duel feed.
There is/was also a foot that cuts the excess fabric off as you did overlock. I have that too.
The machine also came with a nice accessory box. Did you get that too? It also came with a hard case, which is nice for transport.
I had a Bernina 200E (sewing/embroidery)I traded in on the new 830. I then traded it up for the new 830 Limited Edition. I do most of my sewing on the new machine, but prefer to use the 930 for really heavy stuff like jeans, leather, strapping, etc.
Some parts are no longer being made for this machine. One is the electric cord. They are still making them for use in the UK tho, but they have different electic power. However you could use a power converter. You can get a new foot pedal, but it's different than the original one. All parts have to be purchased thru a Bernina dealer. If you find parts on e-bay/etc make sure they are OEM parts & not generic.
Enjoy your 930 :).