WagonR is a decent option, has lots of space and power, is economical too.
Since you want a small hatchback and will carry five people and through the mountains, best to avoid automatics, unless its a 1300cc or over.
A wagonR is a stable car, economical and spacious, it is also small enough to fit in tight spots.
Another option could be the bravo, since its essentially a mehran, it will be torque and reliable.
Last Option, given if you can fit the car, and you people aren'tvery tall, you can get a swift.
With 5 on board, mileage will be pretty much similar by all the above cars.
And as others have suggested, if you don't mind secondhand cars, nothing comes even close to the old shape cultus, sturdy, economical, spacious and stable