The first thing is to get a car with the towing capacity needed which I believe is1134 kg fully laden. You then need to make sure the car is heavy enough for the job. The car must be heavier than the loaded caravan and the general recommendation for beginners by the two clubs and the NCC is the caravan should not be more than 85% of the cars kerb weight although an odd percentage or two over is not going to be of any real concern. You should therefore be looking for a car weighing about 1400 kg upwards. Get a good branded tow bar, Witter or Westfalia are two names to look out for.
Frankly there are not any bad tow cars these days and given that towing should be a relatively small part of your driving I would look for something that fits your normal life style bearing that in mind.
Diesels do work best as tow cars having more torque at low revs and being more flexible when towing but a decent powered petrol engine will cope.
You will find plenty to help you on the Advice section at the bottom of this page and I would also try the Caravan Club site where you will find more advise under Advice and training.
Bailey of Bristol Caravans have a beginners video on their web site although the correct way to connect the electricity is from the post to the caravan and not as they show it.