Google is your best friend in this case. These are basic questions that can be answered by looking for info on your router. That's all that any of us are doing anyway.
Here is one thing I have to know, if I reset my router, will it forget up my phone services (AT&T) and TV services? (Xfinity)
There is no phone thing plugged into it.
Here is whats plugged in
Ethernet
Master cord the xfinity guy put into the router and into a outlet (circular cord)
Power Cord.