Welcome to the Board! You have a lot of options when it comes to the type of suspension you want. A stiffer suspension is nice, but it definitely takes a toll on your butt and back. You would really have to abuse the car and drive hard to damage steering parts. However, you will throw the alignment off more easily. A lot of us use a strut/spring combination. The most popular being the Koni Yellow struts and TRD springs. That will give you a nice drop without being very aggressive. If you want/can spend the extra cash, a nice set of coilovers (such as Silk Road, Cusco, JIC Magic, or TEIN) are nice as well. From your description, the Koni/TRD set up will probably exceed your needs. If you want TRD springs, get them quick. They will be harder to get in the future (there is a group buy on them now:
TRD Springs). Also, since you are running 16's you can go with some bigger tires. 225's in front and 245's in the rear without rolling your fenders (this might rub over big dips/rough roads) or 255 if you want to roll them. Good luck and post if you have any questions. Your english is good enough to understand so don't worry!