Go to your hardware store and ask for some soap for washing your walls, after that you'll need filler to smooth the walls back to flat, most people just paint the wallpaper, its the quicker alternative.

Read alice dee first After washing you should prime the surface. I like the water based Killz because cleanup is with soap and water. The regular Kills requires ammonia for cleanup. Benz works well also but I don't know if it comes in a water base. First thing - NO alcohol while working, the following morning you'll wonder why the job looks so awful. Always use a drip cloth - you'll be sorry if you don't. Mask with tape where you deem necessary-you probobly deem alot more places necessary after you start painting. If you're going to paint the ceiling. Do it first. Remember paint drips down. Next, do the corners with a brush. Using a brush, trim(cut in) where the ceiling meets the wall. Dip the roller, roll off excess so that the roller doesn't drip a lot of paint- Then go for it, rolling vertically, horizontally and at fourty five degree angles. Don't roll too fast or you'll sling paint. Good luck. Note: After you've finished you'll inspect your work and find every mistake in the world I promise that visitors will never notice. The first time I installed a floor I thought it was an awful job,very amaturish, but everybody seemed to be impressed(or they were just being polite)