Hi Neelima,
Thank you for using Syncfusion project,
We can't start the page number anywhere from the document.
We can change the page number to roman numeral by using below code snippet.
//Create page count field
PdfPageCountField count = new PdfPageCountField(font, brush);
count.NumberStyle = PdfNumberStyle.LowerRoman;
Please let us know if you have any concern.
With Regards,
Praveen