I think you should check the review of Suneel Bhai on PW regarding Santro.
As far I know I kept this car from 2006-2013. Brand New bought by my father, later I learnt driving on it and had some of the good memories. This car was ahead of its time. Now, in 2018, still you can feel that you are driving an old car.
The things which are now standard are like Power Mirrors, Power Windows, Power Steering which can be swap through any good reputed shop in the Car Market. Spares are easily available