Pinkish color prolly cuz the previous owner used ATF in the gearbox. Not a big deal, mostly preference. Do a search on the topic and you will find a bunch of posts. Water in the gear oil....Did the bike take a swim? Previous owner go nuts at the car wash? Water pump seal gone bad? I'd start with the water pump. Drain the radiators and look for oil in the coolant as well.
Do a search on heli coil. Those drain bolt threads seem to be a prettly common problem, after you fix it use a torque wrench when retightening.
Good luck.