Ok, here are my opinions:
1) Not sure about the average. My Axio used to give me around 11-12 KM/L and I think Corolla would give the same too (Intercity driving).
2) Yes, 10th gen Corolla has far better road grip than the 11th gen. My cousin recently upgraded from his 10th gen to 11th gen and felt a drastic decrease in the road grip. I'm not sure about it's pick.
3) Personally, I would choose the 10th gen Altis as it looks far better than the 11th gen. The rear of the 11th gen looks too high and it has a hideous wheel gap.
4) No, this is where I'll disagree. Axio still has a better resale value just because of being japanese. A 2008 Axio G would cost around 16 lacs while you can easily get a low mileage completely genuine 2011 Altis 1.6 (base model) for about 16.5 lacs.
Here are the answers to your questions asked above.