Two questions:
(1) What does "its a p reg and it is totally green but otherwise looks to be fully complete" mean in American?![]()
(Not kidding, I really don't know.)
(2) Can you take pics for us to see? Otherwise you're not going to get very specific feedback.
Finally, if it has been sitting for awhile you are going to have major problems getting it up and running again for exactly the reasons you mentioned - gasket failures, lubricant breakdown, rust, etc. Again pics would be helpful.