Is that true if we had 1000 IDR, it only value 1 IDR?
Yes, its true

Bank of Indonesia estimated this re-denomination  needs approximately about 10 years. First step that Central bank will do is socialization from 2011 and will be end at 2022.

Socialization will be done until 2012, and then continue to transition phase on 2013. In this transition period, Indonesia will use two (2) kind of rupiahs, "old rupiahs" and "new rupiahs"