What is the insurance on your current car? Do you have collision? Do you need it? Early on, you might not have the cash buffer to self insure a ~$6k car, but then again, if it really was totaled, you could replace it for something less expensive. Given that's mostly unlikely, you probably don't need collision on your car.
If you borrow to buy the Civic, you will absolutely need collision, as the lender will require it. Get a quote for the insurance, compare the two, and multiply out 5 years so you get a better comparison of overall costs.