Lets start with you got a car that is 13 years old and to a dealer its worth hundreds not thousands. If you don't want payments you keep what you got if it still runs good.
For you to trade into a smaller car with no payments,,, that is no no no ,,, you know what you got at present,you till take a big gamble not knowing what you're getting should you trade with no payments.
When you're ready to make payments to trade up, get back to me, and let's start from there