Retired Vet car totaled, need to replace, limited funds

I own and have driven for the past 12 years a 1998 automobile that was recently involved in an accident. I've always been able to maintain the car in good condition, as it is all I can afford. However, as of this writing, the car was declared totaled as a result of the accident and with only liability insurance, there was no payout by the insurance company. I live in a community with no public transportation and as a military retiree, my funds are limited, with enough just to get by. A down payment and car loan is simply out of the question and at this point beyond my affordability realm. I'm looking to replace my car with one that is reliable, yet inexpensive, as luxury isn't what I'm looking for, just simple, reliable transportation to an from the grocery store, doctor's appointments and the like. I cannot work, as I suffer from congenital heart disease, but sufficient enough to be approved for disability. Your help will be greatly appreciated.