Reply to Need advice ASAP before purchasing sound system for fitness studio...

I go tot he experts with my question. So, forgive me for the little I know about sound systems. I had a self contained unit that was given to me and I was able to connect to speakers to it, my ipod and my wireless mic. The unit is an old wooden boxed n speaker but it has been great to me. Is dying tho and I want to get something before it does. I have to bose speakers overhead connected to the wall. I was advised to get a mixer and a set of speakers to go on stand that I can connect to as well as connect my ipod and the other speakers I have already. Is this good advice Please help ASAP.