Hello Hasan Özgilik,
It is in fact possible to have the actual entities and DAL code (scopes and scope provider) in one project. From what I can see you do not have a reference to the Telerik.OpenAccess.35.Extentions, if you just add one, the issue should be solved. Also you can drop the .Select(p => p) call as it is unnecessary.
As to your second question this is also possible, but you will have to do some careful configuration. There is a help article explaining how to accomplish this. However if you do have a question, do not hesitate to contact us back.
I would suggest having a look at our Getting started articles as well as the online documentation. It would definitely be of great help to you to have a more complete understanding of the product. Please note that you need to look at the OpenAccess Classic node as it is referring to the old wizards approach which you are using.
I hope this helps, please contact us back if you need further assistance.
All the best,
the Telerik team
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