what to do about paneling on every wall in the house

[Bobby Forsythe]

so im wanting to buy this house and every damn wall in the house has paneling on it except the bathroom and its got wallpaper everywhere. What do you do in that situation. do you automatically put sheetrock right over the top of the paneling and how do u deal with wallpaper.? Thanks guys im really wondering if it makes the deal not worth it unless if i gotta redo all that. Do i have to remove the wallpaper and the paneling? Thanks for the help