If you are missing some specific assembly ( like this one ) and you cannot find in the EmptyProject folder you may look for it in the SDK:
C:\Program Files (x86)\Telerik\Sitefinity 4.2\SDK\Content\Common\Dependencies
The specific dll - 'Telerik.OpenAccess.Adonet2' can be found in the folder. However if you create blank new project the file is not necessary. If you have some custom content that references to the dll you may need to add it to your solution.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items