How do you recharge weapons?

The television that I'm playing my Xbox360 is pretty standard, with no bells and whistles.

The problem I've having is that some of the writing on the screen is so small I can't read it. I just bought Dead Rising and everytime there is dialogue from a radio call I can't read it.

Does anyone know of anything I could do to make the onscreen wording bigger?

I'm finally going to do it - I am going to set aside my Xbox and get the Xbox 360.

I understand, however, that there are about ten different types of Xbox 360. Can anyone tell me about any of the differences between models.

Also - I've alot about Xbox 360s being glitchy. Is it true?