There are certainly several dynamics going on here. At first glance, it may appear that the congregation lied about their attendance, but mid-July is just about the worst time to judge church attendance since it is the peak of vacation season.
The staff sounds pretty typical. A long-timer who doesn't want anything to change and a newcomer who likely started under an interim pastor who can't wait for someone to be in charge.
The finances are certainly concerning. An endowment fund shouldn't be used for normal expenses and a 22-year-old van that we're not even certain yet if it's being used.
It's also very clear, between Jose, Mary, and Ralph that they are looking for someone to make things run smoothly and are hoping for an administrative-minded pastor.
The first things I would want to find out is what the giving looks like and whether or not the van is being used. Probably the best place to start would be with the church moderator and then attend the board meeting and just listen, letting everyone know that you're trying to get a feel for how things run.