what can i feed a baby lizard that came into my house?

Wild reptiles tend to do very poorly in captivity. Firstly, all lizards need insects to eat. It needs insects that are smaller than the space between it's eyes. So if you can't provide that small of crickets, flies, moths, and other bugs, you need to order them online. If it's a really small lizard, you could also try ordering flightless fruit flies from reliable sources here on the web.

If it likes to climb (like a green anole would) provide some fake plants, branches, and vines for it to jump and crawl around on. If it's a terrestrial lizard, provide some rocks, places to hide, you can still use some fake plants as well as branches. If you don't know which one it is, create an environment for both.

All lizards also need proper lighting. You need to buy a UVB light, as well as a basking light. If it's nocturnal disregard the UVB light, but I doubt it's nocturnal. Get a florescent 5.0 or higher and a regular house hold 75w bulb or less for heat. Different lizards require different temperatures, so you need to find out what type of lizard it is, then research a care sheet for it. This will tell you what you need for lighting and temps. The lizard needs these in captivity and this can't be skipped. It needs the heat for digestion and growth properties.

Along with the small approprietly sized insects, you need to buy calcium with d3 and multivitamin supplements. The food needs to be dusted with these 3 times a week. If you do not use these, the lizard can develop serious problems so you can't skip them.

A small shallow water dish is fine. It must be cleaned daily as lizards tend to use the bathroom in them.

Crickets.

If it came from outside, he'll hunt for food on his own. Depending on how big he is, He'll eat any bugs he can find. If you don't have any bugs in your house (not even ants) You should find him and put him outside so he doesn't starve :]

if it came from outside than let it be it will hunt food . if its like a gecko put some like bannas (mush) or you can buy crikets and let it go in your house than sure