Based on my own experience, so don't take it as the holy grail.

1) shop doesn't provide installation but they can recommend installer.
You can also request/nego for cabinet maker to install (i think this is better).

2) yes.

3) for your hob, it says max 2.0 + 2.2kW, so a 20A should be sufficient. My Teka has total 4.6kW and the user manual says it only needs 15 or 16A mcb iirc. Mine comes with a 15A plug. 4mm² wires should be more than enough. I was too kiasu and ran a 6mm² wiring.

Hood uses very little power, so they normally tap from your 13A sso per advice from my electrician.

4) no idea.

Note: if I am redoing my kitchen, I'd run separate cables from main DB and set up another DB in the kitchen. Makes things easier if you want to add new 13A SSOs without having to limit electricity loading on the existing SSO circuit (using oven, or clothes dryer for example, if the dryer is using the existing shared circuit).

you need to share the product link here, if not we cant advise. or ask the seller.

how to calculate amp

2200 watt / 240v = 9.2amp so 13amp no problem

CORRECT, cannot use plug, wire to wire connection then external 20a on/off switch similar to air con installation

could just be a typo should b L & R

zheilwane Would like to ask the same question as Human Nature asked also, I ordered HPJ98 from you few weeks ago. But can't check what is the wattage online (only found power supply is 262W but I don't think that's the power rating)

YES ALL HOOD 13A

this diagram, i sendiri add the wiring

actually all these u need to ask seller.  some brands got provided the hose n cap some brands dont.

some brands got sell extension cover to cover, if not then plaster ceiling box up