V-Bucks are the trading currency in all the Fortnite modes, i.e., Save the World, Battle Royal, and Creative.
You must have read it online that getting Save the World mode helps you farm V-Bucks by simply logging in daily or completing quests.
Currently, Metal Team Leader Pack is the only official way to get access to Fortnite’s STW mode since Fortnite has retired the Founder’s editions with patch v13.20 on June 29, 2020, as Fortnite left early access.
So, if you’re buying Metal Team Leader Pack only to farm V-Bucks with STW mode, then don’t because you’ll only get 1000 V-Bucks, after completing 4 challenges that require you completing some daily quests.
After that, you get no V-Bucks!
From v9.40, Epic has replaced V-Bucks with X-Ray tickets for non-founders, as mentioned here.
Fortnite Save the World is an amazing game, and you will love it. So, buy it only to play. If your goal is to farm V-Bucks, then it will be a waste of money.
Epic has also permanently slashed the in-store pricing of V-Bucks and Metal Team Leader Pack by 20%.
So, for the price of the Metal Team Leader Pack that is $15.99, you can instantly get 2000 V-Bucks.
At the same time, MTL Pack will give you max 1000 V-Bucks, that also after completing four challenges.