Yes, all the hardware and fittings are sized in metric, but there are American equivalents for some. (8mm = 5/16, etc.)
There is no American equivalent for 10mm.
Metric
The blower on the back heater may need to be replaced on the 2000 Ford Winstar.
What work needs done? You will need a good set of metric tools, and the rest depends on what is wrong with the engine.
Generally you will need basic metric wrenches, and metric sockets and possibly a torx head socket on some models. Also jackstands and hydraulic jack.
Yes, the simple answer is yes - Japanese cars in general need metric tools - make sure you have plenty of 10mm wrenches for sure.
Standard set of mechanics tools SAE and Metric, floor jack, jack stands, low profile trans jack, large drain pan and a repair manual for that vehicle.
The theromstat is in the hose that is connected to the engine. It will have about 3 or 4 bolts, you need metric tools for it.
There are over 1,000 tools and sets of tools you will need. Start by buying a basic Automotive tool set. Add sockets up to 2 1/2 inches and the equivilant in Metric. Over 1 1/4 you can get by with only SAE or Metric. Wrenches to match. Add to the kit from there
This depends, although most likely standard unless you have a Eunos model which is the European Miata, which those use metric.
In my experience, the registry of the aircraft plays an important part in the prevalence of metric hardware on Airbus aircraft, but I have not found any Airbus products that are completely standard or completely metric--you'll need both, depending on the work you are performing.
According to the ( 2003 ) Ford Windstar Owner Guide : With engine oil filter change : The 3.8 liter V6 engine takes ( 5.0 U.S. quarts of 5W-20 )
tools you need for job