Ok ya'll my mom had this car since 05 and its up to 140k miles, the clutch has reached its end, my question is i know its cheaper to order it online and i know a mechanic that can do it locally, where can i find this kit, and what else should i order besides a clutch kit? could the flywheel need work? it was driven for around 500 miles, with the clutch starting to slip ( my moms daily driver ) and if i can fix it the car can be mine ( first car im 16

) so any tips would be appreciated. Also what in terms of work can be done to the car? performance wise? and i was hopeing to put some subs in the car but i notice its full of plastic behind seats and etc. and tips to dampen any rattle?