You can find and buy stuff later. If you are wanting to incorporate magic into a DW swordsman build, I suggest farming some respawning ghosts with magic and pyromancy in the undead crypt when you come across them
36: Ancient Awarded to users with at least 2000 Karma.
If i start the game with a Sorcerer will shops sell magic equipment earlier?
And also how can i farm some respawning ghosts with magic and pyromancy in the undead crypt?
For early game your best bet for gear is to put 20/20 int/faith and talk to the hex dude in Huntsman Copse for the gear he gives/sells you.
20 faith may be higher than you want but he will give you his set and you can always respec later.
Alternative to that would be to kill him and theoretically you could by his set from the skinny witch lady.
Also the Lizard staff is the best staff for int builds with s scaling in magic for much of the game. It will be a randomn drop from the necro mage guys in Huntsman Copse cave and the Chariot Boss fight.