I want to give some tips on getting them tame. Let me first say, Put yourself in your tegu's position. He is small, you are very big. Big things eat small things. So in his mind he is thinking you are wanting to eat him.To start with, you must build trust with your lizard. Here’s some helpful hints: first off the most important thing that people do wrong, is disturbing them when they are in their hide, never do this, this is their place of safety, that is one sure way to lose trust with your tegu. Next never (man handle) them, they seem to respond better if you are gentle. It is not going to happen over night. And just try to stay calm around him. If he thinks you are going to hurt him he will go into the fight or flight responce. So just take your time, and he will realize you are not a threat and calm down. Keep this in the back of your mind. In the wild these little guys are prey, so when you handle him, remember this. He will come to know you as a friend and not a foe. If you are gentle and slow when handling them, they will feel more comfortable, and respond better when they are handled.
Think of them as your puppy, when you pick him up, do not grab him behind the neck or around the belly, just reach under him. Hold him with a lite grip.
Tegus are the same as a puppy, they don't like to be grabbed either.
Instead reach under them with a loose hand and be gentle. Also when handling them. Let them move through your loose hands, just keep putting one hand in front of the other until he calms down and stops moving. Just remember, the more you grab them and try to restrict them, the longer it will take for him to trust you and become tame. The more interaction you have with him, the better. Just try to handle him with a very slow hand, in a calm manner.
Put yourself in his shoes, how would you react if you were him?
Try getting a tub with nothing in it, put the tegu in the tub. Set the tub on your couch when you are watching TV. Put your hand into the tub, but do not move towards the tegu. Better to let him come to you, tegus are well known for being very curious. See how this works and let me know, within no time he should start to become calm.