Join a server. Buy your weapons using the B key. But now, under the equipment tab (slot 6), you will see the Portal Device .
The Strogino CS Portal hosts several popular servers, many of which are frequently populated: Bruss's CS Source Servers #1 through #4. strogino cs portal counterstrike source download pc hot
If you are looking for the latest "hot" version of CS:S for PC, the Strogino distribution offers: Join a server