Blimey mate the amount of posts you've put up about this car it sounds like it's on its last legs! I'd take it to an good reputable indipendant garage and tell them all the things u are worried about and pay them an hours labour to check the car over top to bottom and get a list of faults, price it all up and see if it's worth doing or punt it on! That's my advise as a mechanic and mot tester matey