Since installing Skype on my computer I have all of these ad's come up I want to take these ad's off of my computer

First thing to do would be to update your Skype. Open Skype, choose help. Choose Check for Updates. Good luck.

Visit http://www.skype.com/intl/en/get-skype/
To download and install the version for your computer

Skype is having problems on thier site. Check out http://heartbeat.skype.com/
It says Sign in and registration. Some customers or areas may currently experience problems.

Hi, first you have to install webcam drivers (CD or download), after that you could open your video chatting application, in example Skype, then in Settings , Audio and Video , in Video select your webcam and start a video call (camera icon botton) with some contact you have added in Skype.

Check if you are offline.
Check if you have added his account in your account list
check if the Message window for your Friend is hidden

Are you using the new version Skype 4.2.0 ? if No, download the latest version and install

Computer to computer calls are made by adding the contacts from your email lists or by adding an email name and asking Skype to locate them. If the user has Skype, you can call their PC. The other user must have Skype.
You can ask Skype to search your address book for Skype users to make this process go smoother.

If you are trying to make a PC to telephone call, you have to add money to your account. This is called buying credit. Land calls are 2.1 cents per minute. PC to PC calls are free.
You can dial any number using your keypad.

You must have a microphone and speakers to make a call to a land phone or other PC.
If you have a camera on your PC, you can make video calls from PC to PC. If the other person has a camera, you can see each other.
The button that says make calls is clicked and you follow the instructions on the screen. The red button is to hang up the call.

Uncheck box next to Install ... toolbar and follow installation process

yes you can actually it's highly encouraged by skype:

references:
http://www.ehow.com/how_2015381_skype-call-me-button.html

adding skype button on outlook 2007
http://forum.skype.com/index.php?showtopic=84417