Some studios can provide photography and videography, so generally they are a tad cheaper than booking separate photographers and videographers. But it's expensive. It also depends on how many hours. Plus you have to feed them and tip them. Around $1,500 - $2,000 should be a good range for a photographer or videographer. So like 3,000 - 4,000 for both. Can be cheaper depending on where you live or if they are newer with less experience. But some are crazy expensive. I got several photography quotes close to $5,000 for just photography. Just get quotes from several places to get a good idea of rates on your area.
There is no average. This is an international forum so no two areas have the same or similar prices and services. Even within a single city, no two vendors offering the same services cost the same, nor will two vendors who charge the same offer the same services. There is a misconception that small towns only have low costs and major cities only have high costs, because sometimes it’s actually the opposite. Without knowing your general area, it’s impossible to gauge. The only way to find out is to look up photography and videography vendors online in your area such as Yelp which doesn’t allow vendors to remove less than 5 star reviews, unlike TheKnot/WW. Look on their website under “prices/services” and compare them equally. Every vendor has a different type of bundle so what is included in one will be completely different from a competitor bundle for the same price.