Back up Generators

We seem to be experiencing a lot of powercuts lately, mainly due to thefts from substations. After returning home with the monthly shop of frozen food and yet another powercut enough was enough. We purchased a generator, http://tinyurl.com/337upwz (Medusa Site Generator T2401).

So its set up to run the fridge freezer in an emergency, however I wanted to ask a couple of questions that you guys might be able to assist with.

I understand that i can only use it up to 2.0kW, so I've been using the watts = amps x volts formula, but reading the manual its expresses it needs to be suitably earthed, so my questions begin...

1) Can the earth be used via the earth terminal block or would i need a earth rod in the ground to solve this?

2) The manual mentions a generator transfer switch, is this where I can Isolate the incoming supply (even if its dead) and then allow the generator to run the supply's to the house, so I could have the boiler and fride freezer running? If so, would you have a rough idea of costs for this?

3) It mentions a power line conditioner for computers and solid state equipment, can you recommend any suppliers for these?

Thanks in advance!
Rob