I have a 94 Toyota corolla 1.6 ,I bought new battery and alternator and it does not have the radio hook on.but my car keeps draining battery?

Don't remove anything else. 1st have you had your battery tested. If your battery is old it might just be to worn out to hold a charge. if you have had it tested (autozone will test it for free) then more trouble-shooting is in order. Go get a multi-meter/amp-meter and do a parasitic draw test. with the key in the off position set your meter to read direct current- milliamps range disconnect your neg batt cable with pos connected read the current between the cable and the neg batt post. (DO NOT read across the batt posts you'll blow a fuse in the meter) **ampmeters are meant to be used in circuit like adding another piece of wire** if the meter reads less than 50 milliamps typically you look at the battery. To figure out what system is draining the battery. open the fuse box and systematically pull the fuses (and replace them) till the current draw drops to acceptable levels. Keep in mind that if this car has been in an accident there could be more than one wiring problem. Once you determine which circuit is causing all the problems get a manual or a schematic of that system for your car and troubleshoot from there. The schematic will tell you what's in the problem system and allow you to pick further troubleshooting points. Keep in mind also that bad grounds can cause battery drain. resistance (loose/dirty) = voltage drop = current. When troubleshooting make sure ground connections are tight and clean. Good luck with your repairs.