Giant Group Ltd. of Beverly Hills reported that TRE Corp. has agreed to surrender to Giant a common stock shareholders list . . . Burroughs said it will make a public debt offering and will pay cash for the remainder of what it owes Sperry shareholders . . . BMW of North America said it will increase the average price of 1987 BMW cars an average of 5.3%, or $1,148 . . . Frigitronics's board voted to recommend that stockholders accept an offer by Revlon Group to buy Frigitronics shares at $35.50 each in a deal worth about $116 million . . . Applied Microbiology said it raised $3.5 million in its initial public offering . . . Mitsubishi of Japan will acquire Siltec, a Menlo Park-based maker of silicon wafers . . . Cetus has filed a suit against Amgen in a patent fight over genetically engineered Interleukin-2, a substance being tested as a cancer treatment . . . Allegheny International, deep in debt and reorganizing after a management shake-up, said it was suspending quarterly dividends on preferred stock, a move that will save about $7 million . . . Polaroid said it adopted a plan aimed at putting a damper on takeover bids that do not treat all stockholders equally.