What touch screen pad type device would be best for this? (see description)

Ok, I actually have 2 separate issues here that can be dealt with separately, or together.

1st: (and this issue is a bit simpler, I think.) I want a relatively cheap iPad type device that would allow me to stream anything from my computer, and allow me to control my computer from the couch (like a remote). What would be best for this?

2nd: I have one REALLY good desktop computer that was built custom for me by a friend and no other computers/laptops of any kind.
My two bedroom apartment, which I have all to myself, has two TV’s that are not connected to anything (each bedroom) and the main one connected directly to the computer in the front room. What is best way (with regards to price/function) to be able to stream and control the computer from the front room to/from any other room. (I would prefer not to have to buy another computer at this point, if possible)

Thanks in advance everyone!