Mob and Player kill no.

[SIDDHARTH2900]

How I can add mob and player kill number on my sword???

Like below. And also how I can name my sword like this???

 

[Minecraftian]

There are 'Mob Counter' and 'Kill Counter' scrolls, usually sold by players in /ah and sometimes found in /transfer. Place one of those on your sword to get a counter. Note that adding a counter scroll sets your weapon to Player Kills: 0 and Mob Kills: 0 regardless of how many mobs you've killed before applying the scroll.

You can rename your sword by using an Item Rename Tag, usually sold by players in /ah and obtainable from Crates (Voting+).
To find color codes, search "Minecraft color codes" in your internet browser.
To test color codes on your item ingame, you may follow this guide.