The ISP is what gives your router its internet connection. You can't bypass the ISP any more than you can bypass the power utility company in getting electricity - you can switch provider or "borrow" from your neighbour, but you need to get it from somewhere.
Linksys is the name of a wireless router, not an ISP; you'll have to check with the owner of the router which ISP they connect it to.
Most likely you just have connection with your router but the router does not have connection with ISP. You need to read instructions for your modem how to connect to ISP.
Yes, you do. Even if you are going to have only one computer connected wiressly you need to have a wireless router for that.
With a wireless network card, you will also need a wireless router, contact your current ISP to upgrade.
Start with an ISP of Cable broadband or DSL then purchase a WiFi router
Yes. In fact, this is the standard, intended way for a wireless router to work. ISP/Internet service DSL/Cable-----> Modem---->Router )))))) PC ---> Cable ))))) Wireless
Depends on how close you are to the wireless router, the speed of your computer, and your isp. Usually it is faster than wired, unless you have dsl.
Neither really. You pay for a connection from an ISP. Your ISP's signals go to your router through your phone lines. Then your PC is connected to the router (through ethernet or wireless), and that's how it accesses the internet. The PSP is no different, it connects to a wireless router and accesses the internet in the same way. It does not use the PC as a middleman, as such.
If you wish to use the wireless network card built into your laptop, then yes, you would need a wireless router. Many ISP's provide you with a modem that also acts as a wireless router for your internet service. But if yours doesn't then you would need a wireless router in order to connect without cabling. But if you don't mind running a length of ethernet cable from your modem to your laptop, then you wouldn't need a router.
Computer > Network Adapter > Router > ISP > Internet
The definition if a wireless internet ISP is your Internet Service Provider. Which can relate to many different companies. Some examples are Bell and Rogers.
Not usually. Typically "network" is referred to as being your home network. This includes any computers you have wired to a router or any wireless computers accessing your wireless access point (can be the same as your router) if you have one. The ISP is the company that provides you access to the internet. This is a typical setup where "network" is anything that is connected to the left of the modem. Computer -> DSL/Cable Modem -> ISP -> Internet