It is called the 'Scuttle panel' or the cowl.
The Scuttle
Usually called the bulkhead.
pedestrian.... preferably a coon
Its called a windscreen..
you can get something called spray and wipe then get your windscreen wipers and clean it
A bonnet.
They are known as windscreen wipers in Britain.
If you are talking about the thing that goes over the horses ears and between its eyes, it is called a fly bonnet.
"Bonnet" is the Britsh equivalent of the "hood" of a car. answer the metal sheet covering the entire engine is Bonnet which is also sometimes called as Hood.
The hood
There isn't an actual word for a woman sun bonnet, but you can refer to them as "cofia victoriana"
Its called the bonnet.