I’m looking to buy a reliable seven-seater for six adults in my family. My use is moderate, about 10,000 km per year and I want a well-featured vehicle I can keep as my main car for 8–10 years. Please suggest.

You should consider getting the Kia Carens Clavis. It's got a comfy and spacious cabin that can be had in 6 or 7 seater forms, and it comes loaded with features. 

The Carens Clavis comes with three engine options - a 115hp, 1.5-litre naturally aspirated petrol, a 116hp, 1.5-litre diesel and a 160hp, 1.5-litre turbo-petrol. Since your yearly running isn't very high, consider getting one of the petrols.