What is difference between LCES2 internal repository and LCES2 Content Service?
Content Sevice is a module if yes does one has to buy or it comes default with any one purchase of module?
Does internal repository come bydefault outof box with the product?
The internal repository is the place where LC stores all of its assets for use in a project. It comes by default with the product and is part of all modules. LC Content Services is a separate module that is used for those Customers that require a Content Management system. LiveCycle does expose services that you can use to interact with Content services. It does not replace the need for the internal repository. It is a separate charge module and can only be purchased in conjunction with another LC module.
Hope that helps