Pretty slow early, but not much worse than any other tank jungler early game. Once he gets bami's cinder and a few levels in his W, it is pretty good. The W armor reduction is really good in the jungle as it allows him to deal pretty high damage to the jungle with basic attacks. His passive works in the jungle as well. Take AS/AD/Hybrid pen Reds, Armor/Armorperlvl/Healthperlvl Yellows, CDR/MRlvl Blues, and Armor/MS/CDR Quints. CDR will give you faster clears, but you will have less resistances. AS will give you the fastest clear for your reds, AD and Hybrid Pen will give you stronger ganks. Armor seals are safest, Taric can get by with Armor per lvl for a stronger mid-late game. Health per levels should only be used if you take armor quints. MS quints are great for Taric as he has no gap closers and it lets him stick to targets better.
I take W first and clear gromp or Red buff. If I take red buff first I level my stun and look for a lvl 2 gank. If I start Gromp, I level my heal and go to blue. Then I go for red and get stun at level 3 with a lot of health. Consider flash stunning for more damage and better follow up with your other abilities.
As for your build, Get Cinderhulk as soon as you can. If you didn't take CDR blues or Quints, Get Frozen Heart and Warmogs early. Sightstone can be an option, but in solo queue at low levels, you might just want to grab an upgraded trinket and pink wards. If you do have CDR in your runes and masteries, Skip Frozen heart and get Thornmail while sitting on a Giants Belt (for Warmog's) or a Catalyst (into Righteous Glory). Spirit Visage is a great item if you need some MR as it works well with your heal and gives you more CDR. Don't underestimate how effective Banshee's Veil and Aegis can be if you need MR though. If you need more Armor on Taric, IBG is a great item as it gives CDR and the spellblade passive. If you are going for more effective health for the same price, Randuin's is a great choice. Basic things to look for in a Taric Build is Armor, Health, Mana, and CDR. If an item has one or more of these, it is probably viable on Taric.
Example builds: These are a few builds that work well with Taric, they are not set in stone as they can be altered and changed around to fit the situation.
(Super Defensive Build, Gives you the most effective Health; you will be unkillable for the most part unless their ADC is super fed, or they have Cassiopeia)
(Much More offensive build and my favorite kind, Has no MR besides the possible Merc Treads but would fair well against high AD teams while they will not be able to ignore you as you can output a large amount of damage; recommended to take CDR in Runes or take Lucidity boots, as the build does not provide much CDR)
(Utility build, this will give you the most for your team but you will not be as tanky or as much of a threat as the other builds; it has the benefit of being the least expensive)
To the OP, good job noticing Taric jungle as a viability. I really wouldn't recommend Triforce as it is just too expensive and IBG gives more effective stats for Taric (Armor, Mana, CDR). It helps him kite for his team more effectively and with the slow effect of IBG, he shouldn't have a big problem sticking to squishies. If you need the MS, take Furor boots or Alacrity with MS Quints. But Taric shines when he can output lots of AOE damage in a teamfight. His Ult, W plus IBG AA is a pretty effectve Nuke to an enemy team that Taric is standing in the middle of.
Taric jungle will work best against a team with high AD for obvious reasons. But he is also fairly good in team comps that have a hypercarry. He is still a support even as a tank jungler; he is one of the best kiting champions when he has IBG, he shreds armor with his W, and he gives a huge offensive buff to all the champions on his team with his Ult.
Check out Taric Jungle today! It will be "Truly Outrageous!"
(Priority being getting highest Effective HP possible.)
Jungle: 
