Records/Quests/Rewards/startingloot.dbr
This is the file that is loaded by the game to the player inventory on character creation. And also again if you mess with a quest file in a game mod lol
As this is a lootItemTable_FixedWeight template, it will spawn only one item. You won't be able to spawn multiple items from this file.
THe file is used in the quest file:
Quests\init - set up all acts.qst
You can add other items using the "Give Player Item" command in this file then import it to a mod