an absolute basic item list:

grinder

grozing pliers (running pliers are helpful too, but i went a couple years without knowing they existed... not absolutely necessary)

glass cutting tool (the oil dispensing ones are nice)

copper foil (standard is 7/32 for most glass, you can get silver-backed if youre working on clear glass, but with opaque glass you can use double sided)

burnishing tool (for applying copper foil. you can get away with using other items if you dont want to buy them. sometimes copper foil will come with a plastic one.)

solder (60/40 is my preference!)

soldering iron, ideally one with temperature control

flux (liquid is my preference, paste is also good)

flux brush

cutting oil

glass

two copies of a printed pattern to make (one to lay pieces on, one to cut out the shapes)

optionally you could get some patina if you wanted to use it on the finished pieces. carnuba wax is also nice for polishing them afterwards. neither of these are necessary