Does lowes have pain in five gallon buckets that can be changed to a different color to paint over wall paper and if so how much is it?

Yes

I do not know but what I would do is to ask Google the phone number to the Lowe's store that you use and contact them directly and hopefully they would answer your questions ......good luck

I would first mud and sand seams so it does not start to peal

Yes. It's around $130.

Yes, a quality paint that will cover your wallpaper effectively will be price from $95-$165 for a 5 gallon bucket.

They do its called killz u put that on let it dry than paint your color if u need help im a professional painter can do it for u