Unfortunately, currently our WebGrid report customization is still limited.

I could not found any method to automatically resize the cells to comfort to a paper change.

You could modify the header and date in the PDF report, however there is a predefined size for the date section and setting a different format may result in clipping issue.

In order to escape the HTML character and forcing quote, you could use the Export event handler to modify the exported data. Here is a Expert event handler which modify the header and date when exporting as PDF, and forcing quote in the cell Name when exporting as Text:

protected void wgTest_Export(object sender, ExportEventArgs e)
{
    if (e.ReportInfo.ReportType.ToLower() == "pdf")
    {
        e.ReportInfo.DynReportCaptions.DateCaption = "Date ";
        e.ReportInfo.DynReportCaptions.DateCaptionFormat = "yyyy";

        e.Table.Caption = "Custom table header";
    }
    else if (e.ReportInfo.ReportType.ToLower() == "text")
    {
        for (int i = 0; i < e.Table.Rows.Count; i++)
        {
            WebGridCell tempCell = e.Table.Rows[i].Cells.GetNamedItem("Name");
            tempCell.Text = "'" + tempCell.Text + "'";
        }
    }
}