I just updated angular-cli (v1.1) and created a new project using ng new MyProj. Then I added and installed two dependencies to the project.json fi
ng new MyProj
Try doing import * as toastr from 'toastr' or import toastr from 'toastr' - the latter is if it has a default export.
import * as toastr from 'toastr'
import toastr from 'toastr'