AFAIK demo units are LTO registered and with plate numbers. Well taht was what i noticed when I bought my 06 civic. They have a separate demo car. When my car was delviered the odometer reading was 77 kms. 129 kms is not high for a brand new car. toyota has a test track where in they drive the car as hard as race car drivers para kung may deffect man ay lumabas agad.

Regarding your fuel consumption, kung matic yan and your route is around metromanila I think its normal. Try to drive it sa highway and compute the fuel consumption by using the old school method. Full tank mo sagad sa takip then reset the trip meter. gamitin for around 100 to 200 kms. then pa full tank ulit sagad sa takip ulit. Trip meter reading divided by the number of liters na naikarga on your 2nd karga you get a more accurate value.

Kung manual yan mejo malakas nga, since my office mate gets 9-10 kms/L combided city and hiway driving. He has a m/t 2.0 vvti