CONVERT HTML TO PDF FORMAT

Short answer is No.
We plan to add PDF export support in one of the next ASPRunnerPro versions.

Has this been added to ASP Runner?

Yes, PDF export was added some time ago.
If you need to convert a free-form HTML page to PDF like view or print page you need to use PHPRunner. Unfortunately there is no good equivalent of FPDF library written in ASP.

what is the cost for getting the secondary application?

can I have both php & asp on the same site?

will i be able to send the session data to the php page, or will I have to rewrite the entire project in php?

tlalle,
contact me directly at support@xlinesoft.com to get pricing info.
If your web host supports both ASP and PHP you can run them side-by-side on the same website.
I'm not sure about sending session data to php page. If you talking about sending some parameters from ASP to PHP application this can be handled via URL or via HTML form post.

I'm hosting my own. IIS 6.