For max worker threads, query sys.configurations. If it's 0, then see this article for the calculation of effective worker threads
http://msdn.microsoft.com/en-us/library/ms189631.aspx
Current you can get by querying sys.dm_os_workers
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability