A "combo package" refers to a bundle or deal that offers two or more things together. It means you can get multiple items or services for a discounted price rather than buying them separately. Full definition
A handful of yoga studios provide classes, retreats and teacher training, and some offer combo packages with surf lessons or diving included. (travelfish.org)
The car seat is the most important part of any car seat stroller combo package. (bestbabystrollerjudge.com)
That I4 combo package gets at least five miles per gallon better fuel economy than the outgoing 2.3 liter. (jalopnik.com)