1) where the hell are the front indicators?
At the front
. They are on the front wings below the headlamps.
2) is there a fusebox/relay box or anything like that?
No
3) why does the exhaust have a line of small (approx 4mm?) holes near the inlet, and also near the tailpipe? Im pretty sure they are not rust holes since they look too regular. Are they some kind of weird gas bleed arrangement for something or other?
No other Bond has these so guess its a owner modification
4) the car IS 12v NEGATIVE GROUND, right?
Yes
5) does anyone happen to know what the various controls do? There are 4 white pull-out handles. I know one is the choke and one is the lights (but it seems to be only a on/off switch), but what do the other two do?
Wipers and speedo lights
6) are the brake slave cylinders from the parts bin, or are they unique? The master cylinder looks like a totally generic British unit as used by...well...almost everything from the 40s to the 80s, but the slave cylinders, im not too sure about. It looks like it only has two, one for the front and one for the rear that operates both wheels through a rod linkage. But anyone happen to know if they were used in any other vehicles?
Front is mini and the rear cylinder is Austin A30. Shoes are mini
Perhaps consider joining the Bond Owners Club as they can provide all the assistance and parts you will require