Federal Curbs on Spending Cramp Campaign's Style
New Fed spending curbs cause less eleborate style in Pres campaigns compared to previous yrs; new system frees campaigns from fundâraising activities but forces them to limit spending and acct for every expenditure; comments from Terry O'Connell, coordinator of Carter Calif campaign, and Martin Hamberger and Richard B Ogilvie, who head Ford's Penna and Ill campaigns resppectively (M)