The large tubes with cross holes & 2 tabs are for the inner tube of an auto chuck ( inner tube screws into rear of power chuck to move the jaws .... good idea to occasionally take out & clean away swarf AND lub ... don't forget to also lub the chuck)
the other items... not sure... but different bore diameters could indicate boring bar sleeves ( can't see if any clamp screws are present ) ... they may fit into the boring bar holder shown in #2 pic R/H side