Dash lights

The description sounds like a loose connection either at the battery or at the fuse panel under the hood. I would start by removing and cleaning the battery cable connections at both ends. Then verify that the ground connections to the engine and body are good. I would suspect loose battery connections especially if it sat on a car lot, they usually disconnect the battery so they do not drain setting there. More than once they just stick the terminal on enough to start the engine and move the car. Then if someone buys it, they forget to tighten it down.