I want to build a media storage device

Hello,

First I want to start off by saying I am new to computer building process. I have some idea of how the process works though. However, I would this build to be as easy as possible (that a toddler could do it).

I am looking to build a device to store my ever growing dvd and music collection. I own over 2100 movies at the current time and still growing. I would like something that will allow for the movies to be played in 4 different rooms simultaneously (different movies). It should offer the ability to play Netflix, Youtube, Hulu, etc. I would like for it to offer a front loader, but this is not etched in stone. I also need to be able to locked some of the contain as it shouldn't be viewed by my son. Since i will be adding movies I need something that will offer auto rip to the hard drive in the easiest process. Also interested to know if there is a program that offers any upscaling on playback (making a standard definition dvd appear in a more HD quality). I need complete hardware, software, and general dynamics for this system. Any help would be truly appreciated.