Regarding FxCop

1-      Does it has Built in Coding Standards (rules)?

Yes

2-      Does it support Customizable Coding Standards (rules) where I can create my own rules?

Yes

3-      Does it Support Source Code Analysis?

No, you case use StyleCop for that purpose

4-      Does it Support assembly files Analysis?

What do you mean??

5-      Does it have rules that cover Code security analysis?

Yes, there is a wide variety of Security rules implemented

6-      Does it Support Data Centralizing/Sharing where team members can share code and manager can assign a code to a tester (Dashboard)?

You can use Team Foundation Server for that purpose

7-      Does it support any type testing like unit testing or creates test cases automatically?

You can use Team Foundation Server for that purpose

8-      Does is Support Reporting? If yes are the reports customizable or not?

Again, Team Foundation Server. And yes the reports are customizable, because it is using SSRS.

9-      Does is Come As plug-in or stand alone?

Both. It is integrated in Visual Studio, and it is a standalone produc

10-   Does it Support command-line option?
Yes


When you are doing code reviews, you also might be interested in TeamReview