[Solved] How to add intro clicks to existing recording?

Insert a measure at the beginning, then add something like a clave on each beat.

I'll give these suggestions a try.  Thanks.
 
I also have Goldwave audio editor.  I wonder if I could do it with that?
 
Thinking out loud (I know it hurts), I didn't think about my SR-16 Drum Machine, but I could add clicks with that.
 

Just for fun:  Back in analog tape days, we had clients bring in 2-inch tapes without counts.  We'd put a tape on the reel upside down, listen a bit to get the feel of the beat, and then during the "end" of the song (which was really the start), we'd start clicking sticks or a woodblock in time—and we'd keep going when the music ended.  When we turned the tape over, we had count-off clicks.  Not 100% perfect, but as good as if a human and done a count-off originally.  You just had to get your mind tuned to picking up the beat of a backwards song.
 
Obviously, this is useless now—just sharing a bit of history.

I added the click using Sonar on a separate track in the project (in time with the song).   I then exported that and added it with Goldwave audio editor to the front of a finished (mixed) track, not an individual track before mixdown. 
 
Worked slick and easy (at least easy for me) doing it this way.

Hey Jack, I'm with ya, I love Gold Wave, best $50 I ever spent. 
Sometimes it's just plain easier to work with a nice simple wave file. And often a stereo wave file is all you have, not a multi track. 
I have had to do this for many clients. The politically correct term is not Karaoke but a Performance track. Karaoke is a  more video format.  Performance tracks are bed tracks from studios and usually way better quality than Karaoke. A lot of church folks use them and have brought them to me to change key's, tempos, add an extra verse, chorus and often to make a better count in. Some were split track format with guide vocals on on side to practice with. Many were tapes I transferred to CD. 
 
I use Wave lab, but most any wave editor will work, Even a freebie like Wavosaur.  Sonar too but it would be my last choice. 
 
Here's a few tricks I've used. 
 
Steal the count in from another song and split and slide the clicks until they count in time. You can do this visually by looking at the songs transients. All you really need is a sound bite of a rim shot of hi hat and a wave editor can quickly cut / copy paste for any style count in. 
I like to accent the down beat and use a 2 measure count in. I often use a snare fill to start. 
1-2-3-4 -1-2-3 TaTaTa 
With 30 years of using backing tracks I have a passion for count ins that actually work. 
 

konradh
Just for fun:  Back in analog tape days, we had clients bring in 2-inch tapes without counts.  We'd put a tape on the reel upside down, listen a bit to get the feel of the beat, and then during the "end" of the song (which was really the start), we'd start clicking sticks or a woodblock in time—and we'd keep going when the music ended.  When we turned the tape over, we had count-off clicks.  Not 100% perfect, but as good as if a human and done a count-off originally.  You just had to get your mind tuned to picking up the beat of a backwards song.
 
Obviously, this is useless now—just sharing a bit of history.

Used to do the same thing.

Johnny V, did you also move the read head to the bottom?
 
Another tip: Plug your PC in 220V instead of 110V and your music will play twice as fast.