I own a MJ189 which is a clone of a Unimat 3 or 4. It makes no matter but there is a huge amount of information on the little early 'Uni' which you have acquired.
Much of it will be available on the YahooGroups - Unimat site which you can join.
Might I suggest that once you have joined that you download the excellent stuff from the late Rex Tingey which he compiled into book form?
Again, there is the information on the Emco site which is available. It doesn't really matter which model because the information can be used as a starter for perhaps you as a beginner.
Again, ANY of the other sites covering the smaller lathes such as the Sherline and the Taig will be helpful.
As mentioned by the other posters here, I also wish you well