Make sure you have the correct foods firstly.

For other supposed, I’d recommend:

– rabbit-specific trash can for rabbit trash (just for your home sake)
– rabbit-specific dust pan/mini vac
– rabbit-specific towels for cleaning
– rabbit-specific dirty laundry bag for the towels
– spray bottle of diluted white vinegar with water for cleaning
– pieces of fabric or old towels for the rabbit to claim as his/her own, which you can lay on the sofa or your rabbit’s various locations so your bun feels comfortable and in their own territory. Fabric can get their scent by rubbing it on them, or feeding them on it so they chill on it for a while
– toilet paper. For yourself. Then keep the tubes for your rabbit to play with or you can stuff hay in it! If you use roll-less toilet paper, you can just find boxes in your house. There’s a lot of diy rabbit toys, so it may be economic to make a few different types first to see what kind of toys your bun likes most.
– water dish (and bottle). Both or just the bowl. If you have just a bottle, your rabbit will probably drink less water than they want, because the bottle requires work. What’s nice about having both is if one runs out or gets peed in, there’s a back up for your rabbit until you change the water supply.
– brush; even non-lionhead breed will shed a bit.

Rabbit specific just means put aside for rabbit use only, not a special one designed for rabbits

Toys can be lots of things. Many rabbits like toss toys. I like the cheap hard plastic baby keys. My boys love those. Other toy ideas would be a cat treat ball, tunnel, cardboard boxes, puzzle toys (e.g. Teach N Treat), chew toys (e.g. willow), etc. I would just start out with a few basic things and then expand once you know what your bunny is interested in.