yes
you don't wifi is already in the phone
You can't "make" your cellphone have WiFi capablity unless it came with it. Smartphones are the only phone that have WiFi capablity most of the time. If you want wifi, get a smartphone.
A wifi phone is just a phone that can use wifi. You would connect it to a wifi network to get a better signal for faster web browsing than a cell tower.
A wifi connection to a router connected to the internet, or a cell phone with internet access through bluetooth tethering
no.
I am not sure why your phone is not setting service when connected to the wifi. I would try calling the phone company and see what they can do.
You cannot use a regular cell phone to either connect to the internet via a wifi hotspot or make voip calls. Just buy another phone which are wifi enabled...
It will be free as long as you use it when you are connected to wifi.
When you buy a cell phone you also need a company to provide cell phone service to that phone, so yes, you will need a plan in order to receive cell phone service. However, there are two kinds of plans. One that requires a contract and one that is called the "pay as you go" or "prepaid" plan. So you do not have to have a contract when you buy a cell phone.
A wifi will only give you internet connection when you are within the coverage range of your cell phone provider. If you have cell phone service, you will have an internet connection. If you are in a dead zone for your cell phone coverage, you will not have an internet connection.
The speed of the WIFI on your LG Thrill cell phone largely depends on signal strength. WIFI speed will significantly improve if you are closer to a hotspot.
A 4G phone is faster than a wifi cell phone, at least when it is on a 4G network. To learn about the differences in phones, see http://www.letstalk.com/blog/post.htm?blogId=1448.