Take a look at local wedding photogs websites and check out their base rate, how many hours included and whether there are assistants and then scale down (or up!) to the time and resources you spent. Also from another angle, assign an hourly wage you are comfortable with and then see if it matches the estimate.
At the minimum, factor in the time you spent or will be spending in post processing- and include all the shots on a DVD as well as a good representative set of prints in a small album. If they want extras or big prints of random things then feel free to charge them but at this point you need to balance the impression you give- don't shortchange yourself and give too many freebies and on the other hand don't just give them a DVD and start naming prices for everything.
Don't worry if you can't buy new camera equipment right away. You can always rent bodies and lenses online with for example lensrentals.com or even locally and then include this in your clients invoice.
As you visit new venues you will discover that lighting is key making a shot. Some churches do not allow flash but the majority of other interior or outdoor locations will require one or more strobes- especially the posed shots. For reportage style during a reception or dance etc, it will be wise to experiment with strobist techniques involving smaller hot shoe flashes and wireless triggers- or even holding the flash with your left hand and camera with right to give more flexible and exciting lighting angles during those fast tight closeups.
Lighting equipment is harder to rent either piecewise or kit based because it depends on the style you develop and the venue at hand- plus having assistants later on with the lighting is a must. The accessories such as wireless triggers and umbrellas, softboxes and stands are even harder to rent so building up a lighting kit that you are comfortable with and can grow with is important at this stage.
I myself am more of a reportage style shooter but I always bring two flashes, some umbrellas and wireless strobes at a minimum because they will always be used if only for fill against the sun.
There is a great FAQ at Fredmiranda wedding forum for those starting out, here is an except with regards to price:
What do I charge for a wedding?
This all depends on how long you've
shot, what products you deliver, and
what market or demographic you are
trying to capture. The low end bride
will want 4 hours - all day coverage
and a DVD of everything for 500.00
bucks. On the other hand many
photographers don't even show up until
a 3-5,000 dollar fee is paid upfront
and THEN albums prices apply. This is
a topic that is hotly debated and will
continue to be for years and years to
My experience in my short time in
this business, is to cover you costs
and equipment/insurance. Whatever that
actually price point may be, many
start with 2 1/2 times cost and work
up from there. Your mileage may vary.
If you browse the wedding forum for awhile you will probably notice the business and backend of wedding photos is a big subject and there will be discussions on insurance, websites, client relations. As you move forward you will probably find the discussion there more and more relevant.