You can get a service kit if you wish.
Engine dependent (what engine?), oil filter is in front of the engine and you can undo it by standing directly in front of the bumper and leaning over.
Air filter you simply un clip all the clips on the box, remove, replace and put it back together. Sump plug is 17mm IIRC. Plugs are easy just don't pull on the HT leads themselves, try pulling on the metal around the plug. Check the gaps aren't closed on the new plugs.
Then check around the suspension shocks for leakage. Check coolant level and top up accordingly. Screenwash, check and make sure the jets are un blocked. Grease the door hinges and check the exhaust isn't blowing. Check all manner of things, how thick are the brake pads etc.
Oh, and tool for the oil filter? Do it by hand you pussy.