It depends on the floor area, the condition of the concrete and the system you choose. A single garage is a small job; large commercial floors take longer. Send through a quote request for a price.
A properly prepared and installed epoxy floor can last many years in a residential garage.
Most cracks can be repaired during prep before coating.
Usually a few days, depending on the system and the weather.
Flake systems and anti-slip additives give good grip, including outdoors.
Fill in the form and a local epoxy flooring installer will get back to you. No obligation.