In the winter, raw beef fat from the local butcher is all you need for your suet feeder. When temperatures rise, raw fat can melt and get rancid. It's safer to use commercially rendered suet cakes in the spring and summer months. Remember, sugar water will ferment when left in the hot sun, turning nectar deadly. Do not put out a nectar feeder if you are not willing to clean it at least weekly, preferably twice a week.
Hummers eat insects for their protein.
There is no evidence that these tiny birds need vitamin and mineral supplements. There is also no evidence that adding red food coloring to nectar will harm the birds, but it probably is not necessary to attract them. Just put your feeder near red flowers or buy a red hummingbird feeder. Bees will inevitably visit your hummingbird feeder, especially in hot weather. Little plastic bee guards may help keep them from getting nectar but it won't stop them from trying.