[CJ_Boxster]

I notice a clicking noise in my front end when I make a sharp turn. Doesn't happen all the time but, more often than not. What could this noise be? Probably the disc below the strut mount, it has ball bearings to allow the hat to stay stationary while the strut spring rotates as you turn the steering wheel.

When is an appropriate time to change the fuel pump? Once in the cars lifetime, well past the 75,000 mileage mark.

I was told by someone that if your fuel pump makes noise, you should replace it. When I start my car, there is a buzzing noise for about 5 seconds and then it quits. Does that mean it's on its way out? Thats normal, Its your Vacuum pump running to aid in heating up the O2 sensors, it does it everytime you start in the am and sometimes on short breaks between driving. The ECU decides.

When should I change the struts, certain number of miles or what? Well, sometimes they can fail or leak as young as 25,000 miles and old struts are ready to replace by about 75,000 miles.

Rough terrain makes the ride jarring at times and something in the suspension rattles. What could be making this rattle, shock mount bushings?
Probably the disc I mentioned in your first question.

Also, the ignition switch used to make a solid clicking noise when I pull the key out, I've noticed within the past week that it doesn't do this anymore. Is this a tell tale sign that it's on its way out and I should replace it? Its the Ignition lock mechanizim, not the Ignition switch. Probably gummed up and not dropping the steering lock pin into the steering column.