Don't know how much I can help but here goes.
There are alot of things that may need to be replaced but if you can get your hands on service records they may have already been replaced.
Some things that come to mind are brakes, wheel bearings, water pump, bushings and/or ball joints, exhaust, oxygen sensors, and guibo (flex disc).
Some of these items might be fine, some may not. Get the car checked out before you buy it.
Also, I don't think the e36's have a torque converter.
Hope this helps.
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<span style='color:blue'>My ass may be dumb, but I ain't no dumb ass!</span>