They are pretty boring, they are one of the many monsters that are in the free DM's Basic pdf on the WoTC site.
Here
http://media.wizards.com/2014/downloads/dnd/PlayerDnDBasicRules_v0.2.pdf
Lizardfolk
Medium humanoid (lizardfolk, neutral)
Armor Class 15 (natural armor, shield)
Hit Points 22 (4d8 + 4)
Speed 30 ft., swim 30 ft.
STR DEX CON INT WIS CHA
15 (+2) 10 (+0) 13 (+1) 7 (−2) 12 (+1) 7 (−2)
Skills Perception +3, Stealth +4, Survival +5
Senses passive Perception 13 Languages Draconic Challenge 1/2 (100 XP)
Hold Breath. The lizardfolk can hold its breath for 15 minutes.
Actions
Multiattack. The lizardfolk makes two melee attacks, each one with a different weapon.
Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target.
Hit: 5 (1d6 + 2) piercing damage.
Heavy Club. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) bludgeoning
damage.
Javelin. Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 30/120 ft., one target.
Hit: 5 (1d6 + 2) piercing damage.
Spiked Shield. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) piercing
damage.
Lizardfolk are primitive reptilian humanoids that lurk in swamps and jungles. Fiercely territorial,
they kill when it is expedient and do whatever it takes to survive.
So a bunch of attacks that are all the same +4 to hit and 1d6+2 damage, and they can hold their breath, same old school type monster that is just a sack of hit points. I would love to see a racial ability like a gnashing bite that grabs you, or a tail slap that trips, maybe different types of lizard folk that spit venom, or have chameleon skin.