Re: 1: Go to the Spam folder and click the Delete All Spam link.
And I can't believe anyone here would be snotty enough to downvote because I used the term "advanced." From what I remember, I am using GMail as it originally was because people complained about this at the time. I can Select All for delete spam in YahooMail. Adding this to GMail would be trivial. And this HTML mode is what people have to fall back to when the "standard" GMail is not working.
EDIT: I had to change the snaplink.