Should I buy this car or save up for a new apartment?

Okay so I'm 20 years old and I'm pregnant and my dad is going to throw me out soon and me and before I got pregnant me and him have this truck we are working on together and he told me he isn't going to work on it anymore because of the baby he gave me the title but it isn't in my name and the bill of sale is in he's and I have already invested 200 dollars into this truck. So my fiancé boss has a car for for 400 dollars and that's how much I have saved up for a place so far. My fiance has a truck but he had a full time job. I would have to drop him off or vise versa. Weekday would you guys do? By the car has 300000 mils on it and a few issues but it drives and runs its a 1900 honda accord dx.

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