All of the problem items you listed are controlled by the instrument cluster, which is noting more then a system computer that also sports gauges and lights for you to look at.
Although it is not unlikely that it has gone bad, I DO NOT recommend replacing it until a few other common and much lower cost maintenance things have been done. I recommend these be done by a technician (even DIY tech) that is somewhat familiar and comfortable with vehicle electrical systems AND understands the importance of disconnected the battery before randomly disconnecting cable harnesses from critical system components.
2 areas that are commons areas of intermittent failure are the big multipin connectors on the back of Instrument Cluster and the bottom of the IPM (Integrated Power Module - AKA Fuse Box). The trick here is to unplug the re-connect each of these big connectors so the contacts are 'cycled' which goes a long way to restore poor connections caused by minor corrosion.
If that fails to restore operation, I would be leaning toward a defective Instrument Cluster; but will advise you to have it tested by a Dodge shop so they can hook up their test unit and confirm if the cluster is in fact defective.
Here is a link
to the wiring diagram for the Instrument Cluster.