Hey Muhib. You and your wife went missing from Facebook.
Doing another social media cleansing session?
Ok, you wanted to do some basic things, starting with the PCVs
The PCV Hose Kit (You need 1 kit)
http://www.courtesyparts.com/pcv-hose-k ... =882_8707&
The PCVs themselves (You need 2)
http://www.courtesyparts.com/11810-pcv- ... 30891.html
The Spark Plugs (You need 6)
http://www.courtesyparts.com/22401-spar ... cPath=882&
The Fuel Filter (You need 1)
http://www.courtesyparts.com/16400-stra ... cPath=882&
And if wanted to do the timing belt since your Z has so many KM, I would recommend the full 120K kit (You need 1)
http://www.courtesyparts.com/bundle-120 ... cPath=882&
IIRC your Z was previously single owner to a Doctor. Most of the time wealthy males will fix their prize cars at any expense and maintain it as early as they have to, but considering the state of neglect with your vacuum hoses I think it's only safe to assume he didn't care much about the car by the time it should've had the 120K done. If you do insist on cheaper then go with the 60K kit.
http://www.courtesyparts.com/bundle-60k ... cPath=882&
And considering the mess of vacuum hoses I couldn't tell you how much it would cost in parts unless you replace all of them. After all that is fixed you could look into your turbos.
These part numbers and prices are Courtesy Parts information. They are similar to Nissan part numbers but only usually the part before the dash. I posted the links here for you to get general prices, but I would turn on Nissan Fast on my computer and get the full part numbers for everything so you could go straight to the dealer and buy them. You'd save on cost, shipping and customs fees that way. The Fast software is just slow and annoying to load up.