There is a lot to cover here.
I'll start on the right and work to the left.
The small lever on the right side activates the whole down feed system. The threaded rod on the very front is also part of the down feed system. There are small levers at the top and bottom of this rod. These parts must all move freely. The quill must be slightly lowered to engage the feed. The lever on the front that moves left to right engages the feed. Move it to the right to engage. The depth of cut is set with the quill stop on the threaded rod on the front. This will make the feed lever kick out automatically. The small lever on the left side controls the feed rate.
I use bar and chain oil on everything that requires oil and on the back of the head there should be a plug or a grease fitting, probably marked with a "B", that hole takes grease.
I hope that I didn't miss anything.
Good luck mate!
John