The problem with these 'old' cars is deciding whether you trust/believe the seller. If they tell you it's had recent front end rebuild and a new timing kit, then great you're good to go for another 20-40K miles without having to spend much on new parts. However, if you don't trust them, or if they say it hasn't been done then it can get expensive.
I think I read this car is 78K miles? If so, then has the timing belt been done recently? Service interval is 40K so it's either due to be done soon, or has been done recently?
My finger in the air costings of stuff I'd want to do are...
Timing Belt & Water Pump £300
Front wishbones £100 a pair
Drop links & track rods - £100 ish.
Shocks - dunno - anywhere between £10 and £500 each.
Tyres - 2 or 4 off at £100 each (for a decent brand)
Brake pads and discs - £100 an axle.
Standard service (Oil, Oil filter, fuel filter, spark plugs) - £50 ish.
So you could easily spend a grand on parts and that doesn't include the cost of fitting them - although it seems you have the skills to do that yourself.
Oh and if you do start working on it yourself, buy yourself a good set of torx box spanners. And read up on changing the fuel filter (those effing stupid clips!).
ETA : Oh and while doing the first oil change I'd be dropping the sump plate off too to make sure the oil pickup is clean of silicone sealant. Relatively simple job, but you'll need the grey sealant to put the sump back on.