Any amplifier is capable of driving 8-ohm speakers. Anything with at least 100 watts should be sufficient, unless you intend to run the speakers at ear-bleeding levels. In that case maybe go with something 2-300 watts.
As far as a mixer goes, “suitability” has nothing to do with the speakers, but how many things you intend to plug into it.
If money is an issue, there should be no shortage of used equipment on Craigslist if you live near a decent-sized city.
Regards,
Wayne A. Pflughaupt