On behalf of my dad.

He was using a BT line to connection to tiscali.net
He has installed suse (new but I'm not sure of exact version).
Then was told that it did not support his internet connection.
Was told he needed a hybrid modem.
Next I know he's ended up with a router but doesn't know what ip adress he should be using.
now he says it's kind of sorted because he can connect to the internet but he doesn't know what service it is using (still supposedly not compatible with tiscali.net) and he doesn't want to run up huge bills by using a "different" provider.
Had no luck with tiscali help as some tell him one thing and other something completely different.
Can anyone unravel this and stop my poor dad pulling out his remaining hair?
Thanks Kia