You will be billed every quarter for all the gas and electricity you have used in the business.
Until you have been trading for a few months you will not know exactly how much energy your driving range will use, although you may be able to make some close estimates. For example, if you know the wattage of the bulbs used in your floodlights, you should be able to work out how much each hour of usage will cost you based on your energy supplier's tariff. Tools like the UK Power Electricity Running Costs Calculator can help you with your calculations. Don't forget that floodlight usage will vary significantly from one season to the next. If you are taking over an existing range, the vendors are likely to be able to give you a good idea of the actual costs to expect.
It's worth shopping around the different energy companies to get the best deal for your business, particularly if you're going to be a heavy energy user. It may be worth considering renewable alternatives such as solar PV, LED lighting and so on as these may reduce your long term energy costs.
You could consider contacting an energy consultancy business to get some information on energy conservation. This could save you quite a lot on your heating and lighting bills.