Agreed with Ameyam, those "wooden" stickers look terrible (IMO) with the Alto's grey interior.
I'd say the stock Alto interior (of that generation) is rather dull. If you want to tastefully modify your interior, my personal suggestions would be:
1. 3-spoke, silver accented steering wheel from a newer Alto
2. Silver-accented round gear knob from newer MS vehicles
3. Pick up some matching matte silver vinyl (available online) to add silver accents to certain places like around AC vents, center console or door handles. Keep it minimal
4. As far as 2-Din stereo is concerned, you may want to ask a nearby accessories shop if they can fit it
If you get a white and red backlit head unit, you could consider replacing the dashboard lights with White LEDs for the dials and Red LEDs for the needles, for vivid colors.
A request from me, please don't fit any horrible fake gauges like in the photo posted!
OT: I did some research and found what is possibly the most horrendous interior in the known universe:
http://www.motorbeam.com/wp-content/uploads/Modified-Chevrolet-Camaro-Interiors.jpg