Personally, I believe that microsoft 10 is a very helpful utility, and it is worth getting.
Even more so if it is on a mac! Apple rocks :)
You would have to buy the Microsoft Excel cd and install that on your computer. The Microsoft license should be included on your cd. Follow the directions on your computer screen and you should have no problems.
Get the Mythic(800 Microsoft points) and the Heroic (Free)
You should be able to buy it from Microsoft's official website
you should be able buy them at any respectable mac or Microsoft store.
Yes microsoft markets anti virus software. If you want to buy it you should go to their website. Microsoft also has a lot of other products for your computer.
Microsoft offers the newest version of its security software from its website, under downloads. You do not need to buy it; it should come as a free download.
You can't download it for free you have to buy the Microsoft pack for around £100-£200. If you can't buy it maybe go to your local library and use the facilities they have to offer they should have microsoft working and ready to use.
You should first do research on the Microsoft website for their products. You can either buy program licenses from them or from a computer software specialty store.
Yes...
with a credit card or go to a store and buy a Microsoft points card.
Any good software shop should have it and you can try getting it online.
Not usually however usually if you buy it off Microsoft direct it will be included. You should check with the people you are buying it off.