You might want to re-check your notes. Only the LS had the 1.8. Everything else got the 1.4 Turbo. Same horsepower, but the turbo makes it available at lower RPM.Cruze 1.8 LTZ
The 2011 was the first year for the Cruze in North America, and it had some teething problems - something that's likely reflected in it's various ratings. Nothing serious (that wasn't covered in a recall), and the minor problems may have been fixed by now. Take a good sniff around after your test drive. Get the car nice and warm with the heater. If you don't smell coolant, you're good.
As for the care, get religion about oil changes and using a full synthetic and you should be good. You probably should follow the service listed in the 2015 manual as the 2011/2012 manuals where a bit optimistic in parts.