@Alex
If you have an Indy licence you can't use Visual Studio, you have to use Xamarin studio and you can't build for iOS in windows. If you want to build for iOS and Android you'd have to use a Mac but you should be able to use Forms. If you want to use Visual Studio and Forms you can only build for Windows Phone if you have an Indy licence.
https://forums.xamarin.com/discussion/18979/what-are-the-licensing-requirements-to-use-xamarin-forms-to-create-windows-phone-apps
As Pavel says though, the licence issues you are experiencing are nothing to do with the Telerik controls.