Free boat for me - lots of questions
This may sound obvious but why not have it surveyed?
If you are getting the boat for free the cost of a survey and even a lift out is a very small price to pay. On the other hand if the boat is a trash heap then the cost of the survey mught be the best money you ever spent.
For the outboard. Lock it and insure the boat. Insurance will replace a stolen outboard if you get the right policy. Get a good used one and the chances of theft will be reduced. Since Insurance companies usually insist on a Survey then we are right back where we started anyway...
Best of luck