Your standing orders may include provision for this but it is not usual to record numbers unless it is sufficiently close to require it and in any event the chair should be summarising the vote before moving on to the next agenda item. So, if a vote is unanimous, I wouldn't think anything other than a statement to that effect is necessary in the minutes whereas if the vote is, say, 7 for and 6 against, I think that should be specified.
You can ask for a named vote provided you do so before the vote is taken. A bit of a time consuming exercise often but can be important, particularly if someone is questioning either the validity of the vote or whether someone should or should not have voted because of an interest.