Q1: Most of the university website that I visited post obsolete information of post-graduate application (application that has passed the deadline). How am I supposed to prepare for my application?
A1: It is common that the deadline for Fall semester/quarter (starting in September) is mid January, or earlier is some cases. So for admission in Fall 2008 (September 2008), you need to get everything in by December 2007, and preferably 1-2 months earlier. Only limited schools/departments offer admission for Spring semester/quarter, see here for details.
Registration for Fall will be for much later. It will not be closed up until December this year. Therefore, it is probably very unlikely for you to send in the registration in May or June. Sending in in September or November should be early enough to get you some advantages, if there is one. Don’t worry, just wait for a few months and you are set. Alternatively, you can write an email to the schools, there will send you all the applications forms.