How can I remove the unwanted information in the form of date, url and so on that runs across the top of the pdf pages?
Unwanted url and info at top of PDF
That happens when you print from a browser, so look in the Print Settings of the browser on how to turn off the header/footer information. For instance in IE8 you'd go to File-Print Preview, then press Alt+E (or click the Turn off header/footer information) to hide that information before doing the printing.