Should I keep my truck or sell it and get a different one?

I'm 17 and I just got my first truck. It's a 1995 Ford F150 (5.0 V8). It's sitting in the garage right now because I can't afford to register, insure, and fix it (it needs quite a bit of work). I didn't buy it. My dad gave it to me. I absolutely love this truck but, I think it'll use too much gas. I had my grandfather's truck for a few days and I think it got pretty decent mileage (Ford Ranger) but, I did have a lot of things to do and places to go (so I had to put gas in it a couple times). I feel like if I were to get rid of the truck and get something else but, I feel like I'd regret it. What should I do?

Added (1). I was thinking about doing that because the body is extremely rusty and is way too expensive to fix. The frame might possibly have some issues.

You might be able to get a lot of money for selling parts.

How do you plan to pay for the new truck? It might be cheaper to repair what you have unless you have a good job and can afford $600 -$700 per month for car payments and insurance.

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