roof leaking -

as your picture shown, there is water mark. this might be heavy or minor case. which can cost from few hundred to ten of thousands. the reason is the roof tiles might be aging and defect, which people will normally replace for the whole whole house.

once the roof tile job done, it is a lot easier for the plaster ceiling. cost around 5 a sqf. but, of course, only repair the affected area.

lastly, due to the uneven colour of plaster ceiling, you migh consider repaint.

wiring -

this is a conceal work. for every 8 foots hack and reseal which inclusive of wiring will cost you easily 150

tree -

no clues.