Bastok isn't a server, it's a country, a place in the server that got selected for you (because you didn't configure it). For starters, find out what server you're in and one server your friend is in. You can do this by going in to the select character screen and looking at the details provided when you have your character selected.

World Passes work like this:

[q=gamefaqs.com]A world pass is something that a player already playing the game can get. They
have to buy it in-game, with in-game money. The more people in a server makes a
World Pass cost more. When someone is making a new character, if they enter the
World Pass code from a World Pass, then they start off in the World Pass
giver's server. A World Shifter is an NPC that looks a lot like a GM. They
allow you to move to a smaller server, but you dont get to choose which one.
However, they do tell you which one you will go on before they send you there.
Note that World Shifters only appear on highly populated servers or at
certain special times.

NPCs that give World Passes:

Kacheda in Port Bastok - Bastok
Ambleon in Port San D'Oria - San D'Oria
Gamimi in the Windurst Tower - Windurst
[/q]

However, if you and your friend are on the same server, this won't matter and you won't need it. You can delete and recreate your character untill you get the right server if you want, or you could beg people on forums (like these) to give you a world pass.

The servers are:

1) Bahamut
2) Shiva
3) Titan
4) Ramuh
5) Phoenix
6) Carbuncle
7) Fenrir
8) Slyph
9) Valefor
10) Alexander
11) Leviathan
12) Odin
13) Ifrit
14) Diablos
15) Caitsith
16) Quetzalcoatl
17) Siren
18) Unicorn
19) Gilgamesh
20) Ragnarok
21) Pandemonium
22) Garuda
23) Cerberus
24) Kjata
25) Bismarck
26) Seraph
27) Lakshmi
28) Midgardsormr
29) Asura

I have gotten Shiva 100% of the time. I don't know if it's Shiva's population, my luck, or my location. I restarted my character a good 4 times.