"I've just broken out of oblivion," says Red Buttons breathlessly. "I haven't slept for five nights in a row. I'm walking on air." Comedian Buttons, 33, has been playing around Manhattan for the past 17 years, mostly in burlesque and quick-folding musical comedies and nightclubs ("I wasn't any Danny Thomas, but I was doing all right"). Last week his Red Buttons Show (Tues. 8:30 p.m., CBS-TV) went on the air with little advance buildup, no sponsor and few prospects of one.
He opened with a strictly autobiographical monologue: "I grew up in the lower East Side. It was a pretty tough block....