cost to start
Welcome Cyrus
In a word how serious ar you?
Find a club close and go and visit. See what they are using as far as equipment and if you still want to try RC then expect to shell out around a Grand.
Two years ago when I started I tried to keep the expenses down and wasted more money than was necessary buying thins that was not needed. Expect to spend around a grand the first year. That will include a second plane after you become bored flying a trainer.
Look for a six channel transmitter that has a frequency that will be available at the club field where you plan on flying.
And good luck.