I am looking at some must haves that every guy must have on him to protect his wrist, knees, etc any other that may be useful for stretching. I need some guidance as I go to the gym regularly and do squats, bench, and rowing.
To be honest, for they type of exercise you are talking about, there are very few accessories you need. Good technique will protect you a lot more than any bit of equipment. To that end, always start with weights you can perform good technique with. Increase gradually, and you will be safe for some time to come.
Depending on the exercises you are doing, the following tools are useful:
Eventually, you may get to the point where you need additional help to get really heavy weights on squats. That threshold is different for everyone, but you want to hold off as long as you can so your core can get stronger. When that happens you will need a weightlifting belt. The belt is a tool to help get your maximum weight up, not a fashion statement for the gym. Only use it when you need it.
When shopping for a weightlifting belt look for:
You may be wondering why I said a pen and paper was needed for safety. Tracking your workouts is more than recording the amount of weight you did. It's keeping notes on how things felt, or if there is something you need to work on. It helps you to not forget important details.
I mostly agree with Berin, but I'm going to reorder and shorten his list:
The rest of the stuff isn't as necessary. You can do dislocations using a broomstick, and non-compressible soles won't be an issue until you're doing serious heavy lifting. Chalk may be useful if you're really pushing yourself with deadlifts and cleans.