Josh, 1)Yes. 2) Probably eventually, but no rush. Included with your player will almost certainly be a connecting cable for audio and video about 4 feet long. You haven't mentioned your TV and at least temporarily you can use the video part of the connector(usually the yellow plug)as your coaxial audio connection, since the video connector is in fact a 75 ohm coaxial cable. 3) No. You can't use the speaker wire for the connection between the sub out on the receiver and the line-level input on the sub. You have to use a coaxial cable with an RCA plug on each end; you can get this for less than $1 a foot from sources such as Parts Express and Cable America.
