In Treasure Island, what did Squire Trelawney and Dr. Livesey decide to do upon viewing the treasure map?
I believe the adventure-minded duo probably saw dollar signs (or, more appropriately, guineas and pounds) in their eyes once they took a look at Billy Bones' map in Robert Louis Stevenson's fabulous pirate novel, Treasure Island. They immediately made plans to outfit a ship in Bristol and sail to the unnamed island (probably in the Caribbean). Squire Trelawney certainly didn't need the money, but he seemed like a bored landowner still yearning for the sea, so he undertook the financial endeavors necessary for the voyage. Dr. Livesey, a former Naval physician, signed on as ship's doctor; and young Jim Hawkins, who first acquired Billy Bones' chest that contained the map, was allowed to accompany them--luckily for the squire and the doctor.
I think that the part that you are asking about is in Chapter 6 "The Captain's Papers." In that chapter, the squire and the doctor look at the treasure map for the first time. As soon as they have seen it, they say that they are going to go after the treasure.
In the chapter, the squire tells the doctor that he should drop his practice immediately and they should head for Bristol and find themselves a ship. They really get pretty excited and start talking about who their crew should be and other such plans.