The PlayStation Knowledge center is a great first place to look for help with questions in the support section of the related link.
You do not need a wireless network for the PS3. The PS3 can be connected via ethernet cable as well. And is the best way to connect the PS3 to online to prevent the possibility of lag when playing online. You can also use the PS3 without the Online connection to Play games, DVDs and Blu-Ray Discs, but the online connection does help with updates besides allowing the use of the PlayStation Network, Store and online gaming.
i got my enternal cable connected to my ps3 to my laptop but still the ps3 dose not pick up the online
no
Depends what you want to do, you don't have to be online at all for the PS3 to work.
no.
You need an Internet source, but you can also connect to the PS3 wired with an ethernet cable plugged into the back of the PS3 and into a router or modem.
The PS3 does not have a router. you must purchase one to connect online if you need a router
you need to connect your ps3 to a wireless modem. or use an ethernet cable.
Yup, in order to play online you need internet.
You need the game in the PS3 to play it online, then it is an option available if you are also able to go online
you need to be connected to internet
No