Again, have to second what 243 states. The problem with wheel-weights today is that many states are gradually phasing out lead, and mandating zinc or iron weights instead.
The very first thing you learn in casting is you DON'T want to get zinc in your batch. But, zinc is easy to separate out, because it floats on top without melting at 650F and has a metallic ting to it instead of dull thud.
In casting, you get what you pay for. I've basically thrown out just about every piece of Lee equipment I've ever bought, and replaced it with more expensive Lyman or RCBS ones. Quality just isn't there with Lee products.
I use a Lyman lubesizer to make my bullets .001" over bore diameter. I measure that by pushing a cast, unsized bullet down the barrel with a wooden dowel.
You can buy lubricant, but I make an excellent lube out of 50:50 moly lithium grease and beeswax. Melt a weighted amount of grease into a throw-away pot with a tight lid. Heat on a camping stove OUTSIDE till it melts. Slap on the lid quickly when the very flammable grease catches fire. Once liquid, drop in the beeswax and turn off the flame. The residual heat in the grease is enough to melt the wax. Keep stirring till completely melted and dissolved into each other. I cast tubes of lubricant into 1" PVC irrigation pipe mounted in a 2X4.
My favorite alloy is 19lbs of wheelweights with 1lb of tin solder. You can get that at the plumbing section of HomeDepot. Scrap pewter at the flea market though is my current source for tin alloy. I flux everything with Brownells Marvelux. This recipe more or less duplicates Lyman #2 alloy which I shoot flat-base bullets up to 1800 fps in my carbines.
I won't dissuade you from going to cast boolits, but problem with that site is the endless discussions on arcane topics like how much zebra fat to add to lube recipe to shoot lead at rifle velocities. Lyman's 49th manual is an excellent source of information and I'd also suggest you start with that.