That looks like the correct tools. I didn't have any and ending up paying a shop to remove my stock radio.
Your SONY should come with a "sleeve" that will mount in the stock opening.
Then your NEW SONY head unit will slide into the sleeve.
If you got your stuff at Crutchfield then you have all of the connectors and the whole deal should be "PLUG & PLAY"!!!
A friend installed THIS setup in a White Crossfire Roadster a little while back. The White Roadster has been replaced with a YELLOW VIPER SRT-10 ROADSTER!!!
Same friend installed the system in my Red Roadster. Unit was used, but not abused!!
Now if I could get him to install a VIPER engine in...