Bguy325is

Hey everyone, first time BMW owner here. Found a 94 325is w/148K is amazing condition thats been sitting for a while, but hopefully I'll be able to get going. Hate to drop a few questions right into the first post, but I'm wondering if anyone could nail down a couple issues I'm having. Thank you in advance to anyone that could shed a little insight. It's either work through a few of these or give up and part the car out of which I don't want to do. 1. Hook up the battery and the gauges are constantly on whether the key switch is off or on. 2. Clutch pedal is to the floor and has zero pressure. Currently replacing the master slave cylinder, but probably should replace the master at the same time. I pulled the old on out, see images, and there was a lot of tan almost saw dust that came out. Not sure what is going on there. 3. I haven't heard it run yet, but the mechanic that worked on it told me it was parked as a running vehicle. Turn the key and nothing happens.