In order to have a jutsu you must purchase it and then train with it to have one. This must be done with every single jutsu weather it be clan, custom, or basic jutsus. They must be purchased in order to train them unless someone already knows it and is willing to train you.
E-Rank Jutsus Costs 100 Zen
D-Rank Jutsus Costs 300 Zen
C-Rank Jutsus Costs 1000 Zen
B-Rank Jutsus Costs 5000 Zen
A-Rank Jutsus Costs 15000 Zen
S-Rank Jutsus Costs 50000 Zen
If you want to purchase a Jutsu this is how you would do it, weather it was cannon, or custom.
Example-
These are the jutsus i would like to purchase.
Name:Kinobori no Waza - Act of Tree Climbing
Rank:D
Type:Ninjutsu
Range:Short
Element:N/A
Description:Kinobori no Waza, the art of tree climbing serves a dual purpose. Taking part in Kinobori Shugyou (Tree Climbing Training) helps a ninja learn how to focus their chakra. It also teaches the ninja how to run up trees and walk on vertical walls. The training helps the ninja learn how to focus just the right amount of chakra to a particular part of their body. The amount needed to climb is small but it must be precise. The feet are regarded as the hardest location to master chakra focusing. So by gaining the art of this skill, the ninja will have any jutsu available (theoretically) because they will be able to focus their chakra as needed.
Name:Suimen Hokou no Waza - Act of Water Surface Walking
Rank:D
Type:Ninjutsu
Range:Short
Element:N/A
Description:A variation on the Kinobori no Waza (Act of Tree Climbing), the art of water surface walking allows a ninja to walk on water as if it was a solid surface. Focusing an even amount of chakra out of the soles of their feet, they can balance themselves on the very surface of the water.
I am purchasing Two D-Rank Jutsus who's Individual cost is 300 Zen making the total 600 Zen.
My Zen is 625
Total cost 600
Zen left is 25