Haha you're in a similar positions as me DaninLids.
Picked up my series 3 petrol two days ago. Filled it up for the first time on the way back and it ****ed petrol all over the forecourt. Must be a hole in the top of the fuel tank but there's still too much in it for me to drain yet to take it off.
Fuel gauge didn't work but I stripped the earth and re-connected it and it's been working so far! At the same time the wipers STOPPED working though!!
Indicators didn't work any of the way home but I think there was just a loose connection behind the dash as I took it off, didn't do anything, and they started working.
Water temp doesn't work, haven't had time to use the multimeter on that one yet.
Drivers door top was a bit wobbly so I took it off to have a look and the bolts that hold it on were totally rotten, no idea how it hadn't fallen off already. Deciding at the moment whether to buy a whole door or just the top.
Other than that it's great! Thinking of it as lots of small problems instead of the whole car being a wreck was the best advice I got. I love the thing already.