Help!! Why Adding Traits and Unit and .... not Working ?!

[Ibn-Khaldun]

You need to write the internal name of a unit into the console. Not the name that appears in game.

For example:

add_unit "Phraaspa" "eastern infantry kavakaza sparabara" 5

And You get 5 units of Kavakaza Sparabara in Phraaspa.

Just check the export_descr_unit.txt file for units internal names.

;121
type eastern infantry kavakaza sparabara << this here is the unit name that You need
dictionary eastern_infantry_kavakaza_sparabara ; Kavakaza Sparabara
category infantry
class spearmen
voice_type General_1
soldier eastern_infantry_kavakazasparabara_sarmatianspearmen_sakaspearmen, 60, 0, 1.1
attributes sea_faring, hide_improved_forest, very_hardy
formation 1.2, 1.4, 2.4, 2.8, 5, square
stat_health 1, 1
stat_pri 12, 6, no, 0, 0, melee, simple, piercing, spear, 0 ,0.13
stat_pri_attr light_spear
stat_sec 0, 0, no, 0, 0, no, no, no, none, 0 ,0
stat_sec_attr no
stat_pri_armour 1, 9, 3, flesh
stat_sec_armour 0, 0, flesh
stat_heat 1
stat_ground 0, 0, 2, 0
stat_mental 9, impetuous, untrained
stat_charge_dist 40
stat_fire_delay 0
stat_food 60, 300
stat_cost 1, 896, 224, 50, 70, 896
ownership parthia, armenia, romans_scipii, slave, carthage, gauls, scythia, britons, germans, dacia, spain, egypt, saba, romans_brutii, numidia, romans_julii, thrace, greek_cities, macedon, seleucid

As for traits it's the same thing. You need the name of a trait from the export_VnVs.txt file.

For example if you play as Sweboz and want Xomorommoz trait then you have to write:

add_trait "(character name)" "Hamarammaz"

because Hamarammaz is the name the game uses.

{Hamarammaz} Xomorommoz

{Hamarammaz_desc}
?omo-rommoz\n(KhO-mo-ROM-moz, “Shape-strong” or Skin-walker)\nThis man believes himself to be a "shape-shifter," able to transform into an animal during battle or times of stress. His fierce, bold, and deranged state greatly encourages his fellow warriors who watch him run fearlessly into the enemy and are inspired to follow, but his overall leadership and ability to manage anything besides his weapons both suffer drastically as his mind is seemingly no longer present. Historically, the Germanic peoples became well-known for their rare and eccentric bear and wolf cults, whose shamanic warriors were dedicated to a particular animal totem. The Ber?swerxiz (“Bear-shirt”) or Wulxwoxoth?nez (“Wolfskin-coat”) would go into an ecstatic trance and was thought to have left his body, communing with W?thonoz (God of Change and Inspiration) in the Otherworld, while his body controlled by animal spirit could not be killed by normal weapons.

{Hamarammaz_effects_desc}
+2 Morale to all troops in the battlefield, -1 Command, -1 Management.

{Hamarammaz_gain_desc}
This man believes himself to be a "shape-shifter," able to transform into an animal during battle or times of stress.

Also, I suggest you to familiarize yourself with the EB names in export_names.txt file. The character name you see in game might not be the name the game uses. So, you sometimes have to try to guess characters names.