Mike,
The Cinq' doesn't have a cover over the rear wiper motor. Cinq'ses don't have many "luxuries" (early models didn't even have back-lit switches!)
The oil leak on the left of the engine is the camshaft oil seal. They all do it guv'. Check out fleabay for a replacement.
Rocker cover gasket (do it at the same time) is about £5 and 5 bolts. Use some Blue Hylomar / gasket sealer to help it out and pay attention when you fit it.. there are little "D" pieces moulded into the gasket that should line up with the groove in the rocker cover.
The clutch needs adjusting a bit. If the pedal is too high, screw the adjuster nut out a bit. 2 or 3 turns ought to do it. Fit an M6 nylock nut on the end instead of the locknut, as it'll stop it loosening off (otherwise the locknut tends to unscrew with the big rubber nut following it).
The washer hose: The hose connects to the washer bottle. The "joint" you found is a valve to stop fluid running back down the tube (keeps the nozzle "primed"). If you have no fluid at that point, suspect the motor or (if you can hear it working) that the pipe is split or kinked.
Cinqses wash bottles live in the wheel arch, under the liner. Take the liner out via the front o/s wheel. The hoses always split or come adrift. New ones are plastic rather than rubber. Top the bottle up and see if you get a puddle in front of the front wheel overnight.
Also the motors can corrode and leak. If you always run out of washer fluid, it's one of these that's causing the problem.
Brake cylinder "leak" .. is more likely to be split fluid than anything else. Brake fluid is hydroscopic (it attracts moisture) so if you spill a bit, water condenses to it and makes it look like there is more there than was originally. Wipe it off and job done. Change the fluid though.. bleed the entire system starting at the furthest corner from the m/c as brake fluid goes "off" after 2 years (absorbs moisture.. performance suffers and you may get corrosion inside the brake pipes). Use DOT4 or DOT5.1 (not DOT5).
Otherwise, enjoy the beast... Sporting is a brilliant little motor.
Ralf S.