Just moved in my house 3 eeks ago- had inspection done- no plumbing problems at inspection. Have used both toilets with no problem before. Now today both commode won't drain completely. In one bathroom I used drain opener and plunger- water won't go down, In other bathroom- will flush but hugh bubbles pops water up- then some water drains and commode does not fill up completely. I have used drain opener in both commodes-HELP-what could the cause or solution be?

Call a plumber, ask how much to clear a main line stoppage.

Your sewer is stopped and need to be cleaned out, not usually something that you can do yourself.
Discuss the problem with whomever you call and discuss the charges for this type of service.