hi,
I need to replace my tires b/c the front are worn out but the back are ok , I dont really know why it is like that but if anybody knows which tires to get please let me know, Also does any one know how long would the new tires last!

Sounds like you need an alignment. Being a rear drive car, your rear tires should wear out before your fronts.

What was the wear pattern on the tire like? Inside edge bald, out side edge bald, bald strip down the middle, feathering of tread, etc. This can give a clue as to what is going on with your car.

As far as tires go, any brand in the same size will fit, but some brands are better than others. Check out www.tirerack.com They seem to have the best deals going. Figure on ~$15/tire to have them mounted.