how to call a few things through scripts

Ok so i am making a custom equip/item menu and i want to know how to do something like this:

To do so i need to know a few things.
1. How would i make each item have it's own individual picture

2. How could i call a picture behind all of the choices everytime they are mentioned
(ex: in the picture it has a red bar behind the weapon, a green behind the helmet and plate, and a blue for accessory.)
(Accidently put 2 accessories lol)

3. How would i make it so that you have to chose an actor to access their equipment
(ex: If both the char menu and the item options scroll up and down i don't want it to glitch so you would have to click on sora's name or actor 2's name to go to the menu to change their equipment.)

4. How would i make it so that you have to chose a peice of equipment to access a menu to change it
(ex: Same as #3 you have to click on the item ex."kingdom key" to open a menu to change it.)

5. How would i make it show only 1 item and scroll for the rest?
(ex: If you choose "kingdom key" it would open weapons and show only 1 with the option to scroll up or down")

AND LASTLY

6. How would i make the weapon/armour show its stats?
(ex: If you chose "kingdom key" it would show atk and str of it, and if you choose firaga bracelet it would show def.)

Phew thats all lol. If you cant tell im trying to make a kh menu type thing
I have mostly everything i need i just need to know what methods/codes to use.

this is mixing me up a bit. you're asking too much. also, most of this is basically added in the defualt game settings anyway. all you really need is more equipment options.... personally i think you should take a look at your defualt scripts. see if you can change any of the equipment scripts now, i will look into it for you if you can't.