I am learning how to use Mylyn. I want to open Task-focused mode on Eclipse's Package Explor. However, the repository I got was bug tracking systems, which has no associated source code with it (or maybe I haven't figured out how to do it yet). I want to open something like in this screenshot:
Do you have any repository which exposes code for me to view?
You don't need to have code in an SCM (source code management) system. Local projects are just fine for playing around with Mylyn. Best to create Example projects (e.g. a plug-in project using some of the samples provided by Eclipse).
As for a task tracking system: the one that comes with Mylyn is the Eclipse bug tracker, so shouldn't be used to submit any test data. I would recommend setting up a connection to one of the repositories here: http://landfill.bugzilla.org/ You can create and submit tasks on those as you wish.
Good luck!