Hi shania, hope this helps.
CTCSS - 60RX - Continuous Tone Coded Sqelch, minimises inteference from other users. There are around 38 codes pending on the make and you can only hear from other uses using the same codes. So say you want to use channel 18, you use this with others travelling with you, set your code and you won't hear from anyone else using channel 18. Its bascically the same as your squelch button, but runs via a code rather than turning a knob.
60RX, there are 60 recieve only channels programmed into the unit. Theses are not transceiving but only receiving, you can listen to them.
SET - CAL - A tone is transmitted as you press in your mic button so others on that channel know that you want to speak, basically a call tone.
BPT - DW - Beep Tone, it emits when pushing the mic.
RGB - MEM - Roger Beep, an emitted tome when you release the mic button after finishing your talk. MEM does a memory scan of frequently used or programmed channels.
DPX - EMG - Duplex button, for using repeater stations, 1 - 8 are received on 31 - 38 by repeater then transpitted again to be received on 1 - 8 again to another unit. helps in mountainous areas or if a further distance is required. Pending on availability and location of repeater. EMG is and insatnt emergency access button, once for channel 5, twice for 35, 3 times to return. Lots of good info here http://www.uhfcb.com.au/
BCL - PRI Busy Channel Lock, stops you accidentally pushing the mic button and transmitting.
DIM - BLT - DIM is your dimmer and BLT changes your back light colour.
Depending on different sets these are a little different, but hope it helps you understand what they are for.