It's important to note that using a Two-Weapon attack is an Attack Action. This means that you can both move and make an attack with both of your weapons in the same round.
That is one of the best house rules for TWF, but unfortunately RAW is different:
Originally Posted by SRD
If you get more than one attack per round because your base attack bonus is high enough, because you fight with two weapons or a double weapon or for some special reason you must use a full-round action to get your additional attacks.
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