Forgot login for Mavericks and had to use start up disc. Now can't access keychain

OK, somehow stupidly forgot my login and had no other way to access my iMac except satr up disc. Well, after successfully changing my login, I keep getting pop ups to use several keychains, yet the new password does not work. Half of my apps wont work properly now and I can't find any answers that work.

Someone please HELP!