Answers:
Well, you'd enjoy to buy a wireless access point and cards for your computers, but that's a one-time expense.
No you do not. The service provider is bringing you internet access, but if you install a wireless router, or access point, specifically up to you, and you a moment ago enjoy to discharge for those devices (purchase at a place of your choosing)
You can hold a wired or wireless see at your home/business, and hold them adjectives connected to the internet. You may enjoy to wages for a setup charge, if you can't do that yourself.
You have need of to buy a wireless router from a computer store. They are almost $50-$100 depend on their features. You hold to place this wireless router between your cable modem and a PC (if you enjoy a desktop using an ethernet cable).