This is one of those instances where I need answers that are written as if you were speaking to a 5 year old. I don't know a whole lot about fishing.
My uncle likes to go fishing on the long island sound mostly but it's getting to be too much of a drive at his age. The majority of fish I remember him catching were porgies and other fish of that size. We're not talking huge fish and his gear reflects that. Rods and spinning reels. Lures, weights, etc.
There are some local lakes, rivers, creeks that have trout stocked by the NJ Fish and Wildlife division, bass and other fish. These are much easier for him to get to but most of his fishing has been in the same area out on a boat. When I think about freshwater fishing I get a picture of someone in waders with a fly fishing rod which would be too much of a shift in gear.
Main fish is large mouth bass and trout from what I can gather.
Can his ocean fishing gear (rods, reels line mainly) be used for trout and bass fishing in lakes, streams and rivers? If so I'm guessing at least the hooks, lures and other stuff that gets tied to the end of the line would need to be different as well as bait. IF this can be done can you make suggestions for a versatile setup to get him started fishing in NJ lakes and streams without getting into fly fishing?