New in Riyadh

Hello My name is Luis Silvestre and i am going to work in Riyadh, in king Faisal starting next monday.
I will be staying in granada housing.
I would like to know:
- What is the best place to change my money after arrival;
- What do i have to do to have a good internet connection to call to my family, by skype for example;
- Is it possible to have portable internet with a router or 3G/4G signal, with a card?

Thank you and see you soon.

You are welcome Luis, 
The best place is the Airport, you will find some banks provide this service.  Ask for Al Belad Bank, the second floor. At arrives gate . In general the airport is better.  more safe.
* yes available  3G /and 4G.