I hope you end up in the hobby. I've been in it 30+ years and enjoy as much today as I did then. It's not just the flying. I've made life long friends and enjoy working on planes as much as flying.
If you want to start flying, find a local club or hobby shop and find someone to help you learn how to fly. This is important because nothing you have can you fly without help. Speaking of flying, once you find a club see if you can trade something you have for a trainer. A good trainer is essential for you to stay in the hobby.
Finally if you decide to sell. The radios are outdated and can't be used. The engines and kits have some value. You have maybe $500 tops for all the engines by the time you pay shipping and eBay fees. The kits have some value also. Some are $50 some might be $200. Shipping is high on big boxes. You should list them on eBay with a $50 minimum bid and see what happens.
My hope is you will take my advice and learn to fly and have a blast. I hope I have have helped some if not.

David