once a week is recommended
You should get your floor machines serviced once every other year. They require regular upkeep in order to last a very long time.
Annually. If it`s fueled with oil absolutely annually.
Your fuel tanks are built to last the lifetime of your vehicle. They should only need to be serviced if they are damaged in an accident, or if some contaminant has been added to the tank.
once a year, or 15,000km whichever comes first.
Inspect at least once a year, base service on what you see.
HVAC should be serviced about twice a year. I prefer service just before summer so I'm not left in the heat and just before winter so I'm not left in the cold.
I have found that the filter should be changed around 90K in normal use and 60K in severe conditions. Toyota Tech.
An automotive lift lifts the cars so they can be serviced from underneath while standing up. They make the job much easier and more pleasant for the mechanic.
The water purifiers should be cleaned and serviced on a regular basis to remove the water deposits. The water purifiers should be cleaned and serviced on a regular basis to remove the deposits left by the purified water.
Serviced.
That will depend on how the vehicle is used and what the manufacture recommends. It could be as soon as every 20,000 miles or as long as 100,000+