With some search and persistence you will find the correct manual, until then you can try this approach;
Place a spool of thread on the spool pin, aim for the tensioner and look for thread guides along the way (hooks, loops, etc., some of the guides on top might be for the bobbin winder, with a bit of testing and trying you will figure it out). You model takes twin needles, and thats why there's two separate thread guides above the tensioner. Make sure the thread goes inbetween the disk. I'm guessing there's three disks in yours (to keep two threads in place) Then aim for the take-up lever, and next the needle, still looking for thread guides along the way.
The bobbin case are often very forgiving on these, but there is usually a correct way to insert the bobbin; make sure it goes properly into the tension spring.
For cleaning and oiling; the top of the freearm comes off, as well as the top of the machine and I guess the face plate in hinged. All gears, levers, hinges, joints, where metal moves against metal needs a drop or two of oil. Turn the hand wheel as you look down the top lid and you will easily detect the oil pionts. Turn and push in buttons, levers etc., there's oil points behind them too.