Lathe Bowl Chuck Advice

After joining LumberJocks and seeing some of the bowl turnings that people have done, It has peaked my interest to give it a try. Here is the problem that I am faced with. I purchased this lathe from someone about 14 years ago. He had received it for Christmas a few years before. He never unpacked or opened the box. It sat in an out building and the box had gotten wet and ruined all of the paper work inside. It was just like new and a little difficult to assemble without the paper work.
The thread size is 3/4” X 10 TPI
My questions are ? Anyone know where to get a manual ? What bowl chuck do I need to purchase? Is the centering pin removable or do you mount the chuck to the face plate shown ? I don’t wish to buy the top of the line. Probably one in the mid price range. I would like something that is fairly simple to use.
Thanks for any help I can get.
God bless

-- Gene, a Christian in Virginia