I wouldn’t use a semicolon at the end of a bullet point, don’t think there’s much in the way of official standards when it comes to bullet points though, they’re a typographical thing rather than a grammatical one so it’s a matter of style. Doesn’t seem necessary to use any punctuation there though, surely the bullet point itself acts as the break, would you use a comma there?
For my money the key thing with bullet points is consistency : if you’re capitalising one bullet do them all etc.
For the terminal punctuation I think it’s just a matter of personal /house style but I would be led by what preceded the bullets, if it’s a subordinate clause or something (“there are several things to bear in mind : begins bullet points”)
Yeah says what I was fumbling towards much more clearly
If the items in a bullet point list are complete sentences in themselves, then each should start with a capital letter, and in general end with no punctuation: eg:
There is more than one way to cook potatoes.
You can roast them in the oven
You can mash them with milk and butter
You can fry them in a pan
If the items are not complete sentences, they should start with a lower case letter, and again omit punctuation at the end: eg: