never done the fuel filter on my jtd but its at the back on the bulkhead and looks nice and easily accessible, just remember it'll be full of fuel you don't want to slosh everywhere.
also being a derv you will want to turn the key on and off several times to bleed the system back up before you atempt to crank it over.
rest is straight forward.
not sure what on earth the other guy is on about with the airfilter, the airbox can only be access from the top, its exactly the same airbox for all the 156 engines. you need to have in mind though that the screws on top of the airbox often go soft so should be replaced at the same time as the service.
they can be very difficult to get into if you get rusty screws so have this in mind when atempting access, be careful not to snap or break any of the what will now be rather brittle plastic of the airbox, unfiltered air getting in will cause issues.
honestly can't tell you where the oil filter is on these, I can tell you on a twinny or a V6 but never looked on a jtd lol can't be hard to spot though you see to have that covered.
as for the axle stands talk going on, not sure what all that is about no jacking points ******. take a look in the owners manual if you are unsure of jacking points. if you look under the car, just behind the front wheel on the floor pan you will find a nice square lump of metal with a circle cut out of it, can't miss it. put your axle stands on that.