Not sure about the disable the swype to call (message) feature, but I do know there is a setting to use home button to answer call and power button to off. I used it for awhile, but prefer the swype. It doesn't disable the swype to call feature, but you got an option where you won't need to swype when answering calls. (FYI, options are in Settings/Call)
Ignore the above advice. Misunderstood the query. I am using GoSMS so never had the problem. Also never remembered facing the same issue while using the stock SMS either. Didn't know can swype to call in there. Guess you could use another SMS app.
As for voice talk, if you have ICS, you can uninstall. If you are rooted, you can freeze it. Other than that, I have not heard of other options.
