missfire could be plugs, leads, coil pack, fuel filter, in need of a decent service.

dry bearing noise is more than likely clutch release bearing. does it go when you press the clutch pedal? wouldn't wory about it if thats the case as mines been doing it since i bought it 2 years/ 20k ago. by the way i also have a mk1 2ltr zetec!

click on the steering IS the rack and a fluid change will only prolong the inevitable rack change bu it's worth doing it as it made my rack last an extra 2 years. if its only just started aswell a fuid change may save it for longer. proper way to change the fluid needs an asistant and front wheels off the ground as follows:

1. lift the front and disconnect the coil pack from the loom.
2. romove the return hose from the reservoir, plug holein reservoir and aim hose into big container.
3. assistant cranks over the engine a max of 10 secs on the starter motor while turning the wheel from lock to lock. at the same time mechanic continually pours new fluid into the reservoir. (10 secs at a time max or you'll burn the starter motor out so crank for 10, wait for 100
4. repeat 3 until all old fluid is flushed out.
5. unplug reservoir, refit hose and reconnect coil pack.
6. fill and bleed the system
7. lower the car and smile. job jobed 8)

if the clicking returns its time for a replacement rack. i've replaced mine on my drive so if you need any info just drop me a pm.