Severely overgrown garden?

I've just moved into a new place and the garden is like OMG lol it's so overgrown everything is taller than me and I'm 5'3 lol there's no way I can do it because I'm useless so I'm guessing I need a hardcore gardener, it's a medium sized garden, all of it completely overgrown, how much is it going to cost? I'm guessing a lot lol