Did you click on the little 'send to GPS' button on the cache page? By using the site It's implied that you agree
YES
It should open a new small box and show the download. Make sure you don't have 'popups disabled' on your PC.
It used to but it does not anymore.
Do you need to buy anything (Geocoins, travel bugs, Cache Containers, Geocaching Stickers) (I don't have any of these)?
And do I need to alert the website and get an event approved? (I have not yet prepared an event but might in the near future.)
I am trying to add friends to my list but it gives me an error.
I think it is because I don't know how to agree to the disclaimer.
I am sorry if I am misunderstanding.
No. Like if you are looking at cache info, there is a rectangle that says
"Please note: To use the services of geocaching.com, you must agree to our terms and conditions in our disclaimer."