Hi Kedar Pujari,
How about creating a in job parameter on the mail job (replace 'Step 1, Job 1' with '<name_of_step>, Job <x>' where x is the number of the job of which you want the stats):
=Query.getNumber('select Job.RunTime from Job where Job.JobId = ?', [Query.getRelativeJob('Step 1,job 1')], 'n')
Alternatively (start time and end time):
=Query.getDate('select Job.RunStart from Job where Job.JobId = ?', [Query.getRelativeJob('Step 1,job 1')], 'n')
=Query.getDate('select Job.RunEnd from Job where Job.JobId = ?', [Query.getRelativeJob('Step 1,job 1')], 'n')
Then you reference that as ${Runtime}, ${RunStart}, ${RunEnd} in your mail source, respectively ... I assume you will name the parameters as such ... ;-)
Regards,
HP