Admin router

Hi all,

As you all know It administrator needs to know everything. In reality this is impossible. I always, only 2 years I use to be an accountant before, learn just so I can understand the subject and if I need to realy go for it only then I learn more get the needed tranning etc.
At the moment I need to learn how to administar our router. I got a router for training cisco 801 but I don't know the password or even how to start.

I have all the cables and I can use the server if needed to connect to the reouter but how to I get in and configure the router.
I am about to star my ccna training but that in 4 months if the company budget will allow that.
Please take your time and see if you can help me.

Thanks