I don't have physical access to my Oracle server but I can run some sql command from Toad. Is there a way I can find wich version the server is running, like 10.2.3.1. I know it's 10g but I'd like to know wich patchs and maybe more (memory used, buffers, etc.)
SELECT * FROM V$VERSION;
In addition, to the accepted answer, you can find out the patches that have been applied by querying the registry$history table:
select id,action,comments from registry$history;
This table is normally only visible to the SYS user.
select * from product_component_version;