You gain 2 points for Strength and Constitution because of your Draconic ancestry.  You gain 1  point for Intelligence and Wisdom because you have longer life spans to learn and acquire knowledge.  However, because of your large size, you lose 3 points in your Dexterity stat.  You also lose 3 points to you Charisma score because of your bestial appearance.

You can see up to 30' in low light conditions

You have the ability to use one of 5 different breath weapons 3 times a day

1. A stream of fire shoots out of your mouth for 30'.  All creatures within the path of this jet must make a Dexterity save (DC 20) to dodge it or take 1d10 fire damage.  If this stream hits a creature, it stops.
2. A cone of icy air comes from your mouth for 30'.  At the end, it reaches 10' across.  All creatures within this area must make a Dexterity save (DC 20) to dodge out of the way
3. A cloud of poisonous gas fills a 15' x 15' space.  You are immune to this, but all other creatures in this area must make a Constitution Save (DC 20) or take initial 1d10 damage and lingering 1d6 damage for 1d4 rounds, or a successful constitution save is made, or an antivenom is given.  Applying the antivenom to an ally is two actions; the first is to reach your target, and the second is to apply the antivenom.
4. You shoot out a ball of electricity.  This ball will drift across the room until it hits something.  All creatures within the path must make a Dexterity save (DC 20) to dodge the ball of electricity.  If the ball hits a target, they receive 1d10 damage.  If all creatures make the save, then the ball will continue to drift in a straight line until it hits something.
5. Your saliva is acidic.  You are immune to this acid, but you have learned to channel large amounts of it into your mouth.  You spit out a large wad of this acid.  It travels for 30'.  Any creature straight in front of you must make a Dexterity Save (DC 20) or take 1d10 corrosive damage.  If all creatures dodge this wad of acid it falls to the floor and is neutralized.

To determine which breath weapon you have, roll 1d12 at character creation.  If you roll a 2 or a 3 you use fire; 4 or 5 you use cold; 6 or 7 you use poison; 8 or 9 you use electricity; 10 or 11 you use acid.  If you roll a 1, you don't have any breath weapons.  If you roll a 12, you have the ability to use them all.  If you have the ability to use all breath weapons, when you use it, you must tell your DM which weapon you are using.

Wings (30% chance)

Every Draconian's wings are fully functional.  To determine if your Draconian character has wings, roll 2d10.  If the result is 30 or less, you have wings and the ability to fly.  In order to get airborne, you must have the appropriate space; 15' to either side of you and at least a 20' ceiling.  Besides being used for flight, wings can also be used to propel you through the water while swimming.

Tails (75% chance)

To determine if your Draconian character has a tail, roll 2d10.  If the result is 75 or less, you have a tail.  If you have a tail.  There is a 15% chance that it is a prehensile tail.  If it is not, it has limited functionality. To determine whether or not your tail is prehensile, roll 2d10 on character creation.  On rolls of 15 or less, it is prehensile; anything over 15 results in a nonprehensile tail. If it is not prehensile it hangs loosely behind you.

If your tail is prehensile, it allows you many abilities.

1. You can use it as a rudder while swimming or flying.
2. When climbing, you can use it to grab rocks, roots, or any other outcrops to give yourself more support.
3. When exploring a dungeon and not in combat your tail can be used to carry a torch or a lantern.
4. When in combat, you have two separate attacks you can use with your tail.  First, you can use your tail to trip enemies (Dexterity Save (DC 15) or be knocked prone.  If you don't use your tail to trip an enemy, you can stand on your tail to do a powerful kick that does 1d12 Bludgeoning damage + 2d4 claw damage to an enemy.  This attack also has a 10% chance to stun the enemy.

To disguise yourself in non-Draconian controlled areas, you can change shape to appear human or elf.

You can read, write, and speak Common, Draconic, and Elvish. 

Draconian is a language made up by the Draconian Race.  It uses Syllables, Sounds, Words, and Phrases from Common, Draconic, and Elvish.  Even though there is one base language, individual clans may have their own dialects and slang.