.........just about every car on the road has "lipped" discs.
It would appear that the specialist might have been very strict (which isn't a bad thing).
IF they'd have said that they were approaching the minimum thickness, then you should change them. If not, they'll be fine.
The suspension bushes are a common issue at 8+ years/100k mile. However for ease I would just replace the wishbones each side and if you are planning to keep the car - use genuine Volvo parts. At lot of pattern wishbones are quite poor quality. Check e-bay as some Volvo dealers sell genuine parts at trade prices (Volvopartstrade, Caffyns, Lloyd etc.)
https://www.ebay.co.uk/itm/Genuine-V...MAAOxyNW9SJfxS
As said it's a relatively easy job, but get a full wheel alignment afterwards.
If the driveshaft seal is just "sweating" then it might be fine for a long time to come, if oil is dripping though it needs changing. A £14 part, about an hour to do. The oil stain is same - if it's dripping it should be sorted but a stain is neither here nor there....
If you do need to replace the brakes, best use genuine Volvo front pads and discs - again kits available at trade prices on e-bay - there is no better quality available elsewhere. Front brakes are a doddle but wire brush the calipers so the new pads slide easily and put the correct grease on the pins. Rears are similar, you can usually wind back the piston using long nose pliers and hand pressure...
As has been said - lots useful vids on Youtube as suspension/brake is Ford based.