Maybe this won't be useful to you anymore, but I hope it will be to someone else.
If you installed ReportViewer correctly on your computer, you must go to VisualStudio and right click on the toolbar (I recommend you do it on the General tab), and choose the option "Choose elements". Once there, check the .NET tab and look for ReportViewer on the list, and pick the one of the Microsoft.Reporting.WinForms namespace (there could be another one for WebForms, and that one you DON'T need in this case). That should do the trick.
EDIT: If you don't find the element, click on the Navigate button on the Choose elements dialog, and go to the next folder: C:\Windows\assembly\GAC_MSIL\Microsoft.ReportViewer.Common\11.0.0.0__89845dcd8080cc91 (the last folder may have a language acronym given by your language: en, es, fr, it, etc.). There, pick up the DLL that should load the component on your toolbar. For more info, check this link.
I hope this helps. Have a good day.