Being at a "museum" represents the dream setting or the area of life the message is about. Currently this person is living in the past, and wishes to PRESERVE life as she knew it (live in a museum).Coats suggest a protective layer against outside forces...coats keep us warm and fuzzy..they keep away any harsher aspects of life. Here she had her "coat stolen"...or in her mind she feels her feeling of security has been taken. Not being able to "call anyone" suggests she feels she has not be able is completely express or have anyone understand what she is feeling right now. "Her car is in the parking lot"....meaning her body and her actions are going no where. The KEY in her mind is the stolen purse....or her Security. The museum was "run by the gas and electric company. Meaning her old life was fueled by the means to get somewhere and the POWER to go forward.
To sum it up...yes, the message is obvious and clear. There is some denial of how life is now as compared to the past. The dream more or less states the facts of how things are for her right now, but also point to what issues in her mind are holding her in the past. She is probably feeling insecure financially and worried that she does not have or maybe cannot afford the same zest and activites of her life. The KEY is making her feel secure, or perhaps having someone a financial advisor perhaps, give her a clear indication of where she stands and what budget she can work with.
....as an aside..perhaps a roommate or someone to help share expenses could be considered.
..just my thoughts ..TL