[verb] + 一点儿 + [noun] [adjective] + 一点儿 一点儿 + 也 / 都 + 不 / 没 + [verb / adjective]
一点儿 means "a little" or "a bit". After a verb and before a noun, it measures a small quantity.
一点 without 儿 is the same word. The 儿 is northern; the form without it is more usual in the south and in writing.
After an adjective, 一点儿 compares: 慢一点儿 is slower than now, 便宜一点儿 is cheaper than the price just quoted. In a request, this is how you ask someone to adjust what they're doing.
These go beyond 一点儿 as "a little".
In speech, 点儿 alone is common after a verb.
一点儿 + 也 (or 都) + a negative means "not in the least".