2) Yes, but not BCF. 900g minimum weight, AS1841 - dry powder is the usual type. Must be mounted firmly in the car, ie not tied to the passenger seat with an occy strap. And within easy reach of the driver.
3) What kind of motorsport do you want to do? If you are doing CAMS stuff, 2S is the minimum requirement, entitles you to do normal club supersprint stuff. If you want to do races, then you need a 3C licence.
Also, you need a secondary bonnet restraint system ie in addition to the manufacturer's lock. Bonnet pins are best, but if you don't want to drill holes in your bonnet, then some sort of belt through the bonnet frame and around the bumper / radiator support will suffice. Again, not an occy strap, it must be non-extensible.