Regarding the engine, the TCi can manage Baguio without difficulty. I've driven our TCi with more than 10 pax to Baguio from Aritao and also via Marcos Highway and all I can say is it depends on the abilities of the driver more than the engine. In the case of Lui, he's comparing it to the CRDi which has 70% more HP and 73% more torque so it's natural that he finds the TCi "medyo mahina". But as he also mentioned, compare the GS TCi with the Toyota Grandia CRDi and the similarities are only on paper.
Regarding central locking and alarm, I paid almost P14K more than 2 years ago when I got our GS TCi from the casa (Code CA-120 alarm). You can get these cheaper nowadays from your favorite car accessories place.
If you want a thorough discussion on the Grand Starex, you can visit
http://hyundaiautoclubph.proboards.c...x.cgi?board=gs