I am not a Dolphin owner, so take anything I say with a grain (or two) of salt.
A search of threads on iRV2 indicates that your coach's fuse block may be under a cover on the wall to the left of the driver, or under a cover on the top of the dash. The cover atop the dash may be held down with Velcro.
You should have manuals for the coach and chassis. If you don't have a chassis manual, information on fuses can be found in the Ford Body Builders Layout Book
. Here's a link to the relevant section for a 2008
chassis; see pages 5 and 6 at that link. If your coach is built on a 2007 chassis, use that BBLB instead.
The fuse panel you are looking for inside the coach is what Ford calls the "Fuse Panel" in the BBLB. The "big" Ford fuses are in a "Power Distribution Box" under the hood, in the approximate center, near the top, against the firewall.
Is it important that you get the coach started (and perhaps moving) soon? It sounds as if you have two different problems: coach won't start and some dash functions don't work. (There may be an alternator/charging problem as well.) I could spend some time combing through the Ford chassis wiring diagrams I have, but my gut feeling is that there isn't a common fuse for starting and dash. If it were me, I'd ask a mechanic to diagnose and fix the starting side (the more serious problem) first, and chase the other stuff down if what he fixes to get the coach started doesn't resolve those other problems.
But hey, going after the fuses first, yourself, is certainly the less expensive option. I would do that too, if starting and moving the coach was not a priority.
Let us know if you find one or more fuse panels.