-Control Harness -$1500
-Adapter accessories - $700
-Swap headers/mid pipe -$1100
-Transmission -$1500-$4000 depending on what you get
-Fuel system -$1000
-3" catback -$500
-Misc other stuff $500-$1000
-$250-$500 for intake/exhaust cams depending on which version of the Coyote you got and if you want to upgrade to GT/Boss spec.
I'm sure I'm forgetting some stuff, there are comprehensive lists out there if you google around.
Hopefully you didn't pay more than $2500 for the Coyote motor from a pick and pull/JY since that's what the F150 Coyote goes for and its damn near identical.
That's just to get it running and doing it yourself. Factor in a lot more if you are having a shop do it.
You'll also want to upgrade the brakes, suspension, rear gears and reinforce the chassis. Since you are a V6 you are going to need to source V8 accessories too.
I am not trying to be a killjoy but I say this to many ppl looking to do this swap, actually research and tally up EVERYTHING plus the cost of the car (and what you think your time is worth) and see where you are at. You can buy a real low mileage Coyote for $20k and a higher mileage one (like 60-80k miles) in good shape for $17k. It may be something you want to consider before moving forward.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.