How do I get a run duration in minutes for each individual step in a single Job?
This should get you started...

select 
    jobs.name
    ,jobs.description
    ,steps.step_id
    ,steps.step_name
    ,steps.last_run_outcome
    ,last_run_time = stuff(stuff(right('00000' + cast(steps.last_run_time as varchar),6),3,0,':'),6,0,':')
    ,last_run_duration = stuff(stuff(right('00000' + cast(steps.last_run_duration as varchar),6),3,0,':'),6,0,':')
from [msdb].[dbo].[sysjobs] jobs
inner join [msdb].[dbo].[sysjobsteps] steps on
steps.job_id = jobs.job_id
order by jobs.job_id, steps.step_id