Do you want a separate output for each instrument or you are ok with a mixed output that contains everything? The latter is definitely much much easier to do compared to the former. If it is your own PA, then it might not apply. The following set up assumes you have access to the venue’s PA system.
Set up wise, it can be easy or difficult, depending on how complex you want your mixing to be.
The total cost for the above set up will be around $1,500 to $2000, depending on the kind of quality you want.
A speaker and amp combo that is portable (or PA).A laptop with DAW software for backing tracks.Here is the minimal equipment setup you need as a one man band to have a good performance