Nice purchase, it's actually come with everything yould need to make a start. DTI and base, the angle thing is useful for finding the centers of round bar so they can be drilled and turned between centers, even has the catch plate for the lathe dog. The milling attachment pole is a nice feature as is what I think is an angle plate for the cross slide.
Your sure to have loads of fun with it, if you need any more reference material to what's mentioned above then send me your email I've a few plans and bits that might be of interest to you on this steep learning curve.
The unimat isn't the most ridgid of machines so depth of cut has to be reduced slightly but it's a very good lathe especially with the accessories that are with yours.