For the bodywork, I would give the beaut a proper wash and clay bar, polish and seal with carnauba wax to prevent rusting. Could get a car cover if you intend to keep it outdoors e.g. to avoid bird dropping which left for longer periods could potentially damage paintwork.
For the engine, change oil & filter and renew anti freeze in case if it snows this winter. Its easy and cheap to do yourself and don't forget to add additive to the windscreen washer
Other areas of concern is the battery, check level and top up if necessary. You may want to disconnect the battery, it will eventually go flat but remember if you decide to disconnect you won't have an alarm to protect it from intrusion.
Braking system is another area of concern. You may want to spray brake cleaner to the front & back brake discs and callipers to remove brake dirt to minimise rusting and possible seizure. Foot brake is another concern too.
Perhaps if you could give the beaut a start once in a while perhaps every fortnightly basis? for say at least 20 - 30 minutes. Keeping the engine running once in a while will help charge battery too, you could even park your car by facing it in the other direction if you like.
Check tyre pressure too, if you have slow puncture tend to it as soon as