[noun] + と + [noun] [noun (person)] + と + [verb]
と joins two nouns as "and". After a person, it means "with".
The pair takes whatever particle a single noun would, and the list is complete: water and tea, and nothing else. For a longer list, put と after every noun but the last.
After a person, と says who you do the action with.
A few verbs need a second person to make sense – あいます会います (to meet), はなします話します (to talk), けっこん結婚します (to get married) – and that person takes と. 会います also takes に.
English "and" joins anything. と doesn't: as "and" it can't join two adjectives, two verbs or two sentences. Adjectives and verbs are joined with their て-form instead.
These go beyond "and" and "with".
と gives the whole list. や gives a couple of examples from a longer one.