Follow this document to format your spfile correctly
http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/create_ps.htm#i63561
You'll see that you need to configure same parameters on both primary and standby such as the log_archive_dest and log_archive_dest_2 parameters. So yes you need to configure the log_archive_dest_2 parameter on the standby also.
Observe the correct format of these parameters.
Create standby logs on the primary before you switchover. It would not cause any problems. It is not used until the primary changes role to a standby database.
I strongly suggest you go through the document above and familiarise yourself with the dataguard concept and administration.
I'm assuming you're running physical standby. If so, follow section 3 and also section 8 for managing dataguard.
R.