Different Traditions use slightly different tools but basically they serve the same purpose. Here is a list of a number of them.
Where possible make your own, but there are plenty of shops and websites where you can buy what you need, or search antique shops and
boot sales. A number of people claim that you should always pay the asking price and never bargain with the seller, but I'm sure that
didn't happen in the past when barter and bargaining were part of life.
These items aren't in themselves magical, they become so through your use of them. They are more about being a focus for what you are and what you are doing. As you get more experienced you will find that you need them less and less, as you will be able to focus and use your power without them.
There are probably items that I have missed but this is a good start.