Hi I have one or two questions about LPG,

Is it safe to use on a turbocharged car?
When its being used is it only running on LPG as surely the fuel pump for the petrol would still be running unless a switch has to be installed?
Also... If your car does say 100 miles to 10 litres of unleaded would it use roughly the same amount on LPG?
Anyone know?
I thank you