Well this one is nice and easy. I charge £45.00 per hour for my time and I am not registered for VAT.
For photography jobs the processing of images almost always takes the same amount of time as I spent shooting them. In other words, if I'm on site for two hours, you can expect a bill for four hours of my time. For video things are more fluid and we'll chat about your needs. For print work it's certainly a case of having a chat about the job you have in mind.
I tend not to charge for travel time within my relatively local area, but if total travel time for a job is an hour or more then I'll charge a modest fee.