Change Tool bar postions and report parameters in SSRS

Hi, We are struggling while rendering SSRS reports like to change the alignment of the tool bar and passing the report parameters in sharepoint.
We can render the report toolbar on bottom of the report as below.
http://servername/sites/sitename/_vti_bin/reportserver?http://servername/sites/sitename/Lists/Report/PICReport.rdl&rv:docktoolbar=Bottom
Report parameters.
http://servername/sites/sitename/_vti_bin/reportserver?http://servername/sites/sitename/Lists/Report/PICReport.rdl&Report_PIC=filtervalue&rv:ParamMode=Hidden