The 30, 60, 90, 120 K miles are the major maintenance periods. At 60K you will primarily be changing fluids, filters, lubricating, checking various components, and making necessary adjustments. One item not always noted is to drain/refill the AHC fluid at 60K. The timing belt is scheduled at 90K and the spark plugs at 120K.
If you register at Lexus.com on the owners page, you should be able to view the owners manual and the maintenance log. Make sure the maintenance log is for the SUVs; at one time the sedans were displayed.