The clunking is probably the bearing on the top of the struts. The bearings usually go bad at about 50k miles. Replacing the struts and installing new strut components should fix that problem. The sway bar links also go bad at about the same mileage. This will give a rattling sound when going over bump. When you replace the struts, you will want to replace the sway bar links. The stiff shifter is caused by swelling of the plastic sleeve bearing on the shifter linkage on the front of the transmission. The shifter linkage is relatively easy to access and remove. It needs to be reamed with a 10 mm reamer and then re-greased before reassembly. The electrical problems may be caused by corrosion in the fuse box. This is a common problem on early model Fiestas. You could try removing each fuse and relay and spray the contacts in the fuse box with electrical contact cleaner and then install all new fuses and relays. If the fuse box is too badly corroded, you may need to replace the whole fuse box. The costs of these repairs will depend on whether you do the work yourself or take it to a mechanic. The parts for the struts will cost about $300. The sway bar links cost about $15 each. The cost of a set of fuses and relays is less than $100. If you take it to a mechanic, expect to be charged about $100 per hour for labor.