Starting up sql server after hard-drive recovery
You can try attaching the MDF file to the new instance, but there is no guarantee that it will work. If the machine crashed while SQL Server was running, the files may actually be corrupt. If you don't have proper backups, you can try:

CREATE DATABASE tms ON 
(
  name = tms_Data, 
  filename = 'e:\path\tms_data.mdf' -- &lt;-- move this file to the data location on new box
)
FOR ATTACH_REBUILD_LOG;


If that doesn't work, this will probably be a very expensive lesson about why we want to take backups regularly and store them in a different location.