Is there a option when printing the pdf file print directly to the same folder as per document location automatically?

No, you can only set a default folder where the PDFs will be saved

Can I also set a automatically the name of a document so I didn't have to write it every time I generate PDF ? How to do it ?

No, that's not possible with doPDF. You can check out our other program, novaPDF, for more solutions on automatically saving PDF files with predefined settings.