'Outlays' refer to external fees (for legal searches on the title of the property), etc. — not part of the solicitors' own fees. REA or any other mortgage broker will give you an idea what to expect.
Your most significant other expense will be the cost of mortgage protection assurance, which must match the amount and term of your loan. Here again, you should use a discount (assurance) broker like www.labrokers.ie who will refund commission — currently by way of a 75% discount on your first year's premium.
Just a thought — you mention that you're a first-timer, that you want a 100% mortgage and 'for as much as possible', yet recognise that 'things will be tight'. Of course, I don't know anything of your other circumstances — salary, job security, other responsibilities, etc. — but don't bite off more than you can chew! Why don't you contact REA and LABrokers and let them talk you through it? I think I'm safe in saying that they both have a pretty good 'rep' around AAM...
outlays are always extra on top of your flat fee or % as the cost of them is not fixed. they include stuff like searches and land registry etc...
for example a solictor would quote you 1400 as a flat fee, outlays could be as much as 700 or 800 more on top so all in for 2200 approx.