Normally you'll need to phone up the companies to set up accounts and payments. For example, I think all bills that I pay are direct debit so the bill automatically comes out of my account on a set date of the month.
Water:
Most people have a water meter as it's much cheaper (especially when living alone) than paying a set amount. You'll just need to call up your local water company (you can Google this) e.g. my water company is Severn Trent, but it depends where you live. Normally either you read the meter which is often under the sink or outside in the pavement under a flap and/or the water company will read it. As an average you might pay £20 a month.
Gas/electric:
Some properties are only electric (electric heaters) and some are electric and gas (gas central heating/hob). I would say having had heating is better and often cheaper overall. You can use a comparison site like u switch and see what the cheapest company is and call them up. I've normally stuck with who the previous people were with because it's often that they are already on the cheapest tariff with the cheapest company but it's worth shopping around. Some landlords will want you to stay with a specific provider. You'll just need to phone them up and open an account and set up a payment method. You'll need to give metre readings at the start of your tenancy, every few months, and then at the end. You can often enter these numbers online if you get an online account or phone up to provide them. As an average you might pay £30-40 a month.
Internet:
Again you can use comparison websites for finding the cheapest/best deal. They'll then normally come out and set you up with the internet box or post the box to you to plug in if the property is already set up correctly. Just be careful with contracts and make sure you don't get too long a contract if you aren't certain that you'll be staying there. Some companies like Virgin can offer 6 or 9 month contracts. Make sure you cancel it a months before the contract ends if you need to end it or when it comes up for renewal phone them a month before to keep the price down. Try keeping the price under £30 a month.
Are you a post grad student or will you be working? If working then you also need to pay council tax. Phone up your local council (find the number online) and set that up if applicable. Council tax can be over £100 a month.
With all of these, please make sure you're on the companies actual website rather than the first phone number that comes up on Google as there can be scammers out there.
You may also want some home contents insurance, again you can use comparison websites for this.
Let me know if you have any questions