hmmm..as far as data cabling goes, yes, you will need a switch. for phone line, that depends on whether you just want to provide an extension from a single line, or have some sort of intercom/PBX setup. For tv/video a simple splitter should do.

data cabling -- RJ 45 jacks, CAT5/5e cabling, crimping tool(available at any pc shop)
phone caling -- RJ11 jacks, couplers, telephone wire, any hardware store

video cabling -- RG57(or was it 58?) coax cabling, jacks, splitters, crimping
tool, optional booster; any hardware store


imho, do look into wifi; even if you do provide an RJ45 outlet for each room, chances are you'll still need some patch cords to reach the table/bed/bathroom.