Don't put your date of birth on your CV (This goes for anyone. It's not required nowadays)
You don't HAVE to list every job if it dates you. If it's relevant and maybe in the last up to 20 years then go with it but anything before that can be left off or covered by a sentence ie 'Prior to this period, undertook roles in retail and customer service whilst studying' IF your experience relevant to the role is a long time ago, then possibly condense more recent work that's not relevant. This isn't a hard and fast rule so do ask if you're not sure in your particular case. (The exception to this is for roles that ask for a 10 year history or full employment record but these are few and far between and tend to be around security clearance ie airport roles)
You don't have to put dates of study as again this would make it easy to guess your age. If you have studied since leaving school, you don't have to list school achievements at all as the ones after are most important to employers so feel free to list them but without dates unless they are recent. If you haven't, it's perfectly fine to say 'Educated to Higher Level' and go on to talk about relevant industry qualifications.
If you had a long gap out of paid work to carry out childcare duties, it's perfectly adequate to put 'Career Break to Raise Family' down, ideally with some qualifications you were studying for or school/voluntary/community work that you did at this time. Putting down that you were a nurse/social worker/ chief plaster putter oner/ cook etc etc just wont be taken seriously. (Apologies, I know this was the advice a few years back but it has dated badly) Much better to put 'Career Break to Raise Family. Undertook SAGE Payroll Training and assisted in the classroom at this time' and then list the training and classroom experience separately under the Training and Voluntary Sections respectively.
Many employers want mature, experienced staff so please don't let this put you off applying, rather use these as tools to get you to interview and then you can show them how much of an asset to their organisation you would be. I'm not for a second saying you SHOULD have to hide your maturity, these are simply tips which will ensure that you are not being unfairly discriminated against before you get to interview.