The white 'box' next to the frame, takes Two-Stroke oil. This is used to mix with the fuel to lubricate the crankshaft, cylinders, and associated moving parts. Search on this forum for oils, to see what others use - generally a good quality fully synthetic oil, like Motul 600 or 710 (or your brand of choice). As was mentioned in your other thread, if you let this get too low, the red light will come on. Ignore this and you will seize the engine $$$$$.

The filler cap on the engine below the kick-start lever is for gear oil for the gearbox. The two are seperate, and you cannot mix the oils. Check the homepage for volume and weight specifications (I think it is 10W30 from memory). It is a good idea to give it an oil change - you don't know how old, or contaminated, the current oil may be.

Did you buy this bike from a dealer, or in a private sale?