This is the least expensive Arduino-clone starter kit I've seen. It comes with an Arduino Uno clone, a solderless breadboard, resistors, LEDs, jumper wires, pushbuttons, and a lot more.
If you need to learn how to use an Arduino, may I recommend my Skillshare video class? If you sign up here you can get 3 months of Skillshare videos for 99 cents. Skillshare has thousands of great videos to teach you about programming, art, animation, and more. I've been a happy paying subscriber for years. I learned how to use Adobe After Effects by watching Skillshare videos to make this IFTF video about blockchain technology, which has over 3 million views.