Inside the church will no doubt be much like any typical church wedding in terms of the photographic challenge and the settings/approach you will need. Maybe it will help to check out some wedding threads and try to hunt down some photos and look at the EXIF data for them.
I fear you will struggle with the kit I see listed, especially if flash is banned. Ideally go and scout the location and see whether you can get satisfactory results, and what you need to do to get them. At my local church I need at least f/2.8, 800 ISO and 1/60 to get a decent ambient exposure with no flash. Here's an example taken with a point and shoot using the settings I just described. You will note that I was lucky that the christening party was well lit, where they were standing (note the mutiple shadows behind them), but look how dim the altar area is. Imagine if, instead of an f/2.8 lens to play with, I only had f/4 or slower.
As your lenses are slower than f/2.8 (much slower if you zoom in) then you'll be looking at 1600 ISO and/or some very dodgy shutter speeds, with the likelyhood of camera shake and/or subject blur. Noise is easier to fix in post than blur so if you have to go to 1600 ISO then do it. Unless you can be certain that your subjects will remain motionless you should not let your shutter speed fall below 1/60 if you can avoid it.
You'll also want to make sure that odd bright patches like stained glass windows or candles in the background don't throw off your exposure, so you will probably be best off with manual exposure at something like 1600 ISO, f/4 and 1/60 for the indoor shots. Best to check it out in advance though, so you are comfortable with the settings, and the results.
p.s. shoot in raw so that you have the most flexibility to adjust white balance and even exposure, a little, without detriment to the IQ.