Hello and thank you for allowing me the opportunity to assist you.
In general, the answer to your question is "no." You can't park on and drive across somebody property unless the owner has given you permission.
However, you've presented a potentially important fact: The prior owner has been doing it for 50 years. The first thing that you should do is check the title to see if there is an express easement that would allow you to drive on the property. If not, then you still have a strong argument in favor of an easement by prescription, which in a nutshell is an easement that a person acquires over time by continually using another person's property in a certain way. Of course, that would ultimately mean that you'd have to litigate the situation. In other words, if you were to buy the property and use the driveway, then the neighbor
may one day order you to stop. You'll then have to file a quiet title lawsuit against the owner to prove that you have a prescriptive easement. That kind of lawsuit could cost you $20,000-$30,000 ... and you may not even win depending on the circumstances. If I were you, I'd stay away from that property unless there is already an express easement in place.
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