The average lifespan of an indoor rabbit is 7 years and can be up to 12 years with proper care. Smaller rabbits tend to live longer than larger breeds.
A rabbit matures between 4-8 months of age (depending on the breed) and is considered a "senior citizen" around 5 years.
Appropriately sized cage
Litterbox & litter
Chew toys & playthings
Tall exercise pen or play yard
Rabbit books - “House Rabbit Handbook” by Marinell Harriman