there are no mot prohibitiion like there were in the old days, you can put your car in 30 days early for mot and if it does fail you can still drive it until the previous mot fails. but.... if your car has failed on brakes / tires etc and your involved in an accident that "could" have been caused by the fault on your car im not to sure where you stand...
the items you have said are wrong with the car dont sound to drastic tbh, i had advisorys on my old 5dr every year, most cases i done nothing to the car and it passed the following year with no advisorys or work done.
the rear bushes i cant see being a mot failure unless there is excess movement on the rear axel beam, the way the bushes are mounted i find that movement will be virtually impossible to detect. they may on the other hand hear the clunk when they drive the car onto the ramp which may point them in that direction. clean any oil off the bushes mounting (if it hasnt already vanishes) and cover the area of the bush with grease, if they ask just say fiat dealer done it as the rear suspension was creeking......
front disks and pads are a doddle, the flex pipe is also a doddle, you just need someone else to help you bleed the system (unless you have one of those one man jobbys).
handbrake cable, are you sure its broken?, and not just in need of adjustment, the cable is easily adjusted under the centre consule, take out the ash tray in the back, there are two screws, remove them, then push both front seats forward and then this will show two more screws on the sides, remove them and then pull the vent (this will pop off), the cover will fall away and then you willl have access to the adjustment mechannism. i think it either a 10 or 13mm.
even if you need a new one it wont be too difficault job to fit you will just need the car up high to get access.
put the car in for mot and see what gets flagged up, if its only the simple jobs happy days...
roy
edit, just noticed you said you had an advisory on the hadbrake cable last year, i bet this is a bend in the cable housing, if it is it wont fail, the only time they can fail it is if the actual cable is broken, if its working correctly then its a pass, they were just drawing attention that it may have a kink in the outer housing, tell me a stilo that dosent have this..... all three stilos that ive owned have had the same issue and its never failed, i wouldnt worry about it until it does actually break which it probo wont.