Well if ur getting a charade 86 in mint condition for 155k well buy it now or tell me and i will buy it :p.
Charade if in good condition the maintainance cost is medium.
The parts are little expensive than khyber but bcoz now a days market is flooded with charade chinese korean and taiwan parts so they are cheap and its hard to find japanese charade parts.
Baki almost everything is available in 2nd hand market (qabli) like whole engines, radiators, steering, brake parts or other things.
Charade is 1000 CC A/C can work if installed properly like the radiator should be changed to 3 nali one, the condensor should be multi aisle and original charade compressor shhould be used (Avoid 2nd hand sendan they put too much load on engine buy new sandan if you can afford it).
I got A/C in my charade and it works fine i wont say its up to my standard but i will work on it this summers :p.
Common problems with charade welll hmmmm i think the hub slips in some charade but that is bcoz if the hub Nut is not properly tight i never faced this prob from the day i bought this car its been 1.5 years but i have heard from people that this happens in charade dun know.
Monthly maintainance well if engine is in good condition and everything fine than there is no maintainance i mean i can keep on driving my car by just changing oil but i experiment every now and than like i installled power steering than i changed other things which i feel not up to my standard ( my standard is no compromise on ride and on the part it should be performing like a new cars part hehe)
I guess thats all btw do let me know if your not buying this car i wanna see it.