What's the Problem ?

Questions & Answers
1

Assets/Scripts/CharacterClasses.cs(23,20): error CS0102: The type CharacterClasses' already contains a definition for Strength’
Assets/Scripts/CharacterClasses.cs(27,20): error CS0102: The type CharacterClasses' already contains a definition for Dextery’
Assets/Scripts/CharacterClasses.cs(31,20): error CS0102: The type CharacterClasses' already contains a definition for Endurance’
Assets/Scripts/CharacterClasses.cs(35,20): error CS0102: The type CharacterClasses' already contains a definition for Intelligence’
Assets/Scripts/CharacterClasses.cs(39,20): error CS0102: The type CharacterClasses' already contains a definition for Health’

using UnityEngine;
using System.Collections;

public class CharacterClasses
{
private string characterClassName;
private string charaсterClassDescription;
//
private int Strength; //
private int Dextery; //
private int Endurance; //
private int Intelligence; //
private int Health; //

public string CharacterClassName{
get{return characterClassName;}
	set {characterClassName = value;}
}
public string CharacterClassDescription{
	get{return characterClassDescription;}
	set {characterClassDescription = value;}
}
public int Strength{
	get{return strength;}
	set {strength = value;}
}
public int Dextery{
	get{return dextery;}
	set {dextery = value;}
}
public int Endurance{
	get{return endurance;}
	set {endurance = value;}

}
public int Intelligence{
get{return intelligence;}
set {intelligence = value;}
}
public int Health{
get{return health;}
set {health = value;}
}
}

2

The problem is that you’re defining Strength, Dextery, Endurance, Intelligence etc. twice - once as a private member and then a few lines later as a public member…