The knocking is probably a bush or bushes & should be fairly easily traced when over the pit. The anti roll bar bushes & drop links for the front bar have a hard life. The drop links crack (ends of the roll bar) & can knock so look here first but it could be lots of others. If you can replicate it bouncing the car it helps.
Clutch may just not have been bled properly. (It's not easy to bleed. See Clarks garage. Better with a pressure bleeder.) Or the master or slave or both could be goosed. There not big money & the slave is fairly easy to replace. The masters a bit more involved but again clarkes garage website details it. You could try bleeding it through first. GSF or Euro carparts often the cheapest.
Can't help with the alarm. Took mine to an alarm specialist & they reset the thing & gave me a certificate that pleased the insurance. (Confirming it cat 1) cost £50ish.
Don't have a low tension wire on my distributor that I know of.
If the car doesn't have loads of mot I'd put it through. Give you something to go at & you can have a proper look underneath. Just watch they jack it right. Easy to damage if there not careful.
Changing the belts should be high on your list. First job I did on mine.
Jim will be along in a bit to put me right
