What do typos in a want ad mean? It could mean the people at the company are a bunch of idiots who can't even write a coherent sentence. Or it could mean they are very busy and threw together a quick ad without proof-reading. It could mean whoever wrote the ad didn't think proper spelling and grammar is important. It could be the person who wrote the ad is an immigrant who is still learning English. It could be that the company submitted a flawless ad and the newspaper or web site or wherever you saw this ad messed it up. (I've had that happen to me with ads I've written.) Just from reading the ad, you don't know.
If the job sounds otherwise desirable, submit an application. If they don't call you for an interview, it's all a moot point. If they do call you for an interview, see how they conduct themselves there. If at the interview it's clear this company is a bunch of incompetent idiots, then thank them politely for their time and turn down any offer. If it becomes apparent that the reasons for the mangled ad are no big deal, then don't worry about it. Etc.
The best way to find out is to go on an interview. Remember, a job interview is the company deciding if they want to hire you, but also you deciding if you want to work for this company. If you go and find this is not a place you want to work, there's no law that says you have to accept any offer.