SVGmix seems to include different icon packs with different licenses. Have you looked if they have any with a license that fits your need? For the corporate lo

SVGmix seems to include different icon packs with different licenses. Have you looked if they have any with a license that fits your need? For the corporate logo stuff, I don't think you can use any of that at any point. It seems fishy to use trademarked logos of private corporations without their explicit consent.