Info on How DB Stats Should be Read

Yagami1211, 
"Ability Parameter
Nin = Ninjutsu. Show the Degree of Proficiency and/or Knowledge in Ninjutsu.
Tai = Taijutsu. Show the Degree of Proficiency and/or Knowledge in Taijutsu.
Gen = Genjutsu. Show the Degree of Proficiency and/or Knowledge in Genjutsu.
Wis = Wisdom. Show the amount of general knowledge and IQ.
Str = Strenght. Show the Physical Strenght of the whole body as well as the walking ability.
Spe = Speed. Show the general speed and the reaction speed.
Sta = Stamina. Show the amount of chakra, as well as Stamina and Vitality.
Sea = Seals. Show the Degree of Proficiency and/or Knowledge in Hand Signs."

Weapon 

"NDB: Hiden Rin no Sho Pg. 14

総合能力：その（???）の忍としての能力（パラメータ上での８項目）を総合して評価

True / Overall ability: (As it relates to the 8 points being scored) The Shinobi's ability according to 8 factors. Each evaluated separately and then summed up through combining the evaluations of each into one overall score.

My Kanji's horrible and there's a few I couldn't read / know so takL might correct this though but there you are.

 the total statistics [True Ability] is what Kishimoto wants you to consider for ranking / overall power purposes"

Gottheim,

Total Ability: An average notation. Take all 8 of the parameter scores (Nin; Tai; Gen...), make a total and divide to obtain a notation out of 5.

Potential: An estimation of the character's likely progression. If they have a Kekkei Genkai or some other skill (like Sakura's chakra control) that is yet to be awakened, exploited or perfected, they potential will be higher.

Luck: Sometimes in a fight, circumstances and chance play a pivotal part. Luck is an estimation, based on observation, of how often a character can count on things going their way. Just replace "luck" with "Plot no jutsu".