@siva44 

for sending multiple parameters and values, you will have to use email script to grab those values.

in workflow send this in event parm1

return current.variables.first_name + ',' + current.variables.line_manager;

Then in email script get the value and split and use in email body

(function runMailScript(current, template, email, email_action, event) {

    // Add your code here
    var parm1 = event.parm1;
    var arr = parm1.toString().split(',');
    var name = arr[0];
    var manager = arr[1];
    template.print('Name' + name);
    template.print('Manager' + manager);

})(current, template, email, email_action, event);

If my response helped please mark it correct and close the thread so that it benefits future readers.