how check Powershell Version ?

Hi...all

I installed SQL Server 2008 Dev edition on XP sp3.(It Installs WPS)

I am very much new to PS..I started testing my Installation.

For example, I typed Get-PS and press the Tab key , 
the following cmdlets are appearing

Get-PSDrive
Get-PSProvider
Get-PSSnapin

But It suppose to show below list 

❑ Get-PSBreakpoint
❑ Get-PSCallStack
❑ Get-PSDrive
❑ Get-PSProvider
❑ Get-PSSession
❑ Get-PSSessionConfiguration
❑ Get-PSSnapin

Why some other cmdlets are missing...Help me how to resolve and how check the Present version of WPS.

Thanks in Advance