1. What else do you want to do? :-)

3. You're going to need other remotes to learn the codes from. In fact, you're going to need to buy the appropriate remotes just for the IR receiver...

4. This is where you really need "discrete codes" for your TV - single codes that go to ONE input. These are not included on most factory remotes, but are used with computer programmable remotes and some of One For All's models. As far as I know codes likely DO exist, but you're going to need yet another remote to generate them...