There is no service fee. You have to be in an open wifi connection area, or get service through your local internet provider for it to pick up internet.
The only fees are ones incurred for wifi access. For example, home internet service, cell service, etc. At locations with free access, (Mcdonald's, libraries, motels and the like then no fees. There are free apps and some for sale at the online app store.
None! This is not a 3G or 4G device. You just purchase the tablet. Like iPad.