Best way is to set them in your server.cfg file, located in garrysmod\cfg (you probably don't have one unless you created it, there is an example file server_cfg.txt or something like that)
Look for the two paramaters, both of which can also be used in the ded. server console
hostname "my server name"
sv_password "my server password"
ULX doesn't have a command to change server and password, at least technically.
You mentioned running a dedicated server in another post.
If you've given yourself ulx rcon access, while in game you could use 'ulx rcon hostname "my server name" ' and ' ulx rcon sv_password "my server password" '
As for the map when starting from command line ded server, use +map mapname
While in game, ulx map mapname
.bsp isn't required