Having said that I know that we can help at least some of your needs.
First, the seat/telescoping wheel thing. This is common and most likely either the switch module on the driver's seat or the ignition switch on the steering column. On mine (a '98 528 that was doing the exact same thing) I removed the left panel at the base of the driver's seat to access the seat switch module. The ears that 'snaps' the connector in place were broken and the connector was loose in the switch module. I used a nylon tie wrap around the connector to hold it snugly in place. The memory seat "talks" to the telescoping wheel through this thing so that fixed all my seat issues.
If that's not it it's likely the ignition switch (not the actual lock cylindar, the switch that goes into it). This is a $45 part from the stealer and can be replaced yourself if you are any sort of mechanic. This switch is responsible for many electrical bugaboos on the E39.
I'm not sure about the glove box latch but, if I recall, the fuse box is in the glove box (had to be, right?).
I'd start by getting a Bentley's shop manual for your series (E39). They're about $100 if you shop around. Use that to do a complete "Inspection II". That will cover most things and get you going good. I'd assume that there was no previous maintence and do everything starting with a complete tuneup. Check BMA autoparts for OEM parts at greatly reduced prices and real cutomer service (sorry, I don't have the number with me).
Welcome to the world of BMW!