But in our server the tempdb could not get created with model database size as 1 mb. It is always start with old size they have like 12 GB.

Can you provide me the properties to change for the database tempdb starts with minimum size

Even I am restarting the server by-weekly the tempdb size doesn't go back original size. It remains the same size what we have earlier. tell me if any reason it...

I can allocate necessary space to grow Tempdb data file space.

Will it be problem, if we have tempdb having this size as 12 GB ?