I have succeeded compiling C::B sources it from SVN but it need debug it inside Code::Blocks.
How compile C::B inside C::B, both under Linux and Windows? (under Windows will be easier because I have Wnidows 8.1, VirtualBox and Linux Mint inside VirtualBox)
Where are Todo lists and bugzilla?
I'm grad to see this post, thanks, hope you will enjoy the development. In-fact that's the same question I would ask when I would like to contribute to C::B, that's many years ago.

It is really easy to build C::B inside C::B. For example, under windows, you just need to open the codeblocks.cbp file, and hit the build the button to build, I think the details can be found in this wikipage:
Installing Code::Blocks from source on Windows - CodeBlocks.
Under Linux, this is quite similar. (though I have never don't that under Linux, so other devs may help)
About Todo and bugzilla. All the bug reports are here:
Tickets, also there are old tickets from old berlios site, see:
old bugs,
old features and
old patches.
There are a lot of Todos, such as fully migrate to the wx3.0 library, as currently we are still using the wx 2.8.12 library, the gdb-mi plugin... I think you can choose the interesting part of C::B to start the development.
If you see any problems, don't hesitate to ask in our forum here.
Thank you!