This is what I get in SQL*Plus 11.2 instant client against a 10g database (I've trimmed out some detail lines, so the sums won't actually match).
If your results don't match, I suggest you post more details (client version, table and query versions, sample output...)
break on owner
compute SUM OF leaf_blocks on owner
compute SUM OF num_rows on owner
select owner, index_name, leaf_blocks, num_rows
from all_indexes
where owner in ('MDSYS','CTXSYS')
and num_rows > 0
order by owner, index_name;
OWNER INDEX_NAME LEAF_BLOCKS NUM_ROWS
----------- ------------------------------ ----------- ---------
CTXSYS DRC$IDX_COLUMN 1.00 1.00
DRX$IXV_KEY 1.00 118.00
DRX$OAL_ID 1.00 120.00
SYS_IOT_TOP_9752 1.00 114.00
SYS_IOT_TOP_9778 2.00 333.00
*********** ----------- ---------
sum 23.00 1,275.00
MDSYS SDO_COORD_OPS_COORD_OP_TYPE 12.00 2,244.00
SDO_COORD_REF_SYS_KIND 21.00 4,384.00
SDO_COORD_SYS_COORD_SYS_TYPE 1.00 65.00
SDO_DATUMS_DATUM_TYPE 2.00 530.00
SYS_C003008 15.00 4,384.00
UNIQUE_STYLES 1.00 78.00
UNIT_OF_MEASURE_PRIM 1.00 128.00
*********** ----------- ---------
sum 137.00 32,202.00