@poster, i own a toyota succeed, probox, 1496cc. The air filter n oil filter used are same of as vitz 2006 and costs Rs. 300 each so total of Rs. 600, plugs should be same as well, i havent changed plugs on mine yet, my mechanic said the plugs installed are good for 60-70k easy, so will change them later. Current running on my car is 60k, bought it at 51k originial mileage, got it checked through mechanic before purchase.
I have got cng installed in it as well and it runs great, great pick, great mileage, excellent grip, abs and srs airbags are there as well.......
Over all an excellent car, use it as daily runner... any further questions feel free to ask