Noob Please explain these performance options

[WRBlue]

Originally Posted by Push

TRD Front Strut Tie Bar

Improve: Nothing. Technically, they tie the front strut towers together so they do not flex independtly of each other. I've never seen a car actually flex in its front strut towers - the cowl and firewall already tie the strut towers together. Moden cars don't flex that much. Now rear strut braces in a wagon/fast back, thats a different story...

TRD Sport Lowering

Improve: That depends on what you think is an improvement ;) . It lowers the car by limiting shock travel. To compensate, the spring rates are higher. So many people (inc. me) say it improves the stance of the car and the handling and kills alot of body roll. The trade off is shorter shock life and harsher ride.

TRD Rear Sway Bar

Improve: Lessens understeer, makes the car more neutral.

What should be bought first and is there anything else i need to get along with it?

Assuming this is a 100% street car, get TRD shocks and the springs and call it a day. Good tires too.