Instead of commenting on the parts of your system, I will try to help you with the rest. But just to get it out the way, you are buying bottom of the barrel equipment. But everyone has different standards.

A good way to tell how many amps your system can use up is by adding up all the fuses, from the headunit to the amps. I can't find the amp you are buying online, so you are going to have to do it yourself. And then from there, you find out how many amps your alternator is capable of. What car is this system going into?

The key to installing a system is knowing what the heck you are doing. You should be able to write out step by step what you are going to be doing. Having patience is a must too...if you start to have trouble, take a step back, relax, then back track. Otherwise, you might start breaking stuff.

If you run into any trouble, just post it here, and I am sure someone will help. If you like, you can always PM me, since I don't frequent this forum like I use to. Good luck.