Taijutsu is body techniques, mostly used in (Guess what O_O') Melee, short range and deals normally heavy Phisycally damage to the target, adding Chakra into your attacks are also normally in Taijutsu. So basically Taijutsu is Hand-to-Hand Combat. <_<'
It's mostly Short Range combat, it's hard to get used in an Elemental fight, and the good thing would be that erm.. <_<... Yeah, to make more Pshyically damage than normal, and if you get into a hand-to-hand combat you're prepared.