Free is a great price, and for car camping size is no big deal. I car-camp solo in a rather roomy three-person tent.

If you eventually hope to get into backpacking, I wouldn't spend much money on heavier car-camping gear, but, as I say, free is the best price you can get.

If the tent has already been sitting around for a number of years, give it a good sniff. If it smells funny, the coating may be starting to deteriorate.

I've never had a tent I could stand up in. Most backpacking tents are 42" to 45" high. You get used to it and learn to dress lying down! I must admit that in my other hobby of Civil War reenacting, getting into corset and long skirts with hoops definitely did not work in my backpacking tent, which is why I bought the larger tent for car-camping. While I can't stand upright in it, I have to stoop only slightly.
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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey