The PS3 does not have any form of windows for the web browser and internet use. Internet Service normally means your Internet Service Provider or ISP which is defined below
Internet Service Provider, an organization that offers users access to the Internet and related service
If you have internet service and a means to connect the PS3 to that service the PS3 has the ability to go online
No the PlayStation Network PSN is free you must pay for your internet service provider and there will be no additional charges from PlayStation
from you modem or router after you have an internet service provider
While Playstation does not provide the internet and you must have an internet service provider and the devices needed for a connection including modem, routers and cables there is not a charge for the Playstation Network. For an individual that only has a PC with Dial Up or no internet service they must get an internet Service with DSL or cable broadband. You can not use your smart phone to provide internet to a PS3
If you have internet service and the WiFi modem or router
Internet Service is sold by Internet Service Providers and the PS3 requires Broadband Cable or DSL internet connection with various rates depending on your service contract. After you have a PS3 connected to the Internet you do not play for the Playstation Network for the PS3 just whatever the Internet Service Provider charges as a monthly fee for connection of all your internet devices
Yes if you have internet service and have signed up for netflix
The related link from the Playstation Knowledge describesHow do I connect the PlayStation 3 computer entertainment system to the Internet?
no
Yes. All PlayStation 3 models have internet capability.
No the USB port can not be used for an internet connect on the PS3. It must be WiFi or ethernet cable
No only the Playstation Network is free you mist pay for the internet