Drywall and Plastering

Viewing a potential home to buy and would like an estimate on the cost of removing wood paneling that is all throughout the home and replacing with drywall/sheetrock. Also would like an estimate for the removal of the current carpet and placing new carpet and possibly wood floors in some rooms. Upon purchase of the home, will plan on proceeding with the project and updating the house. So will be looking to use whoever provides (reasonable) estimate.