I already spent some time typing this up as I mentioned in the previous reply - so I'll post anyway...
Starting with the estimated year of birth of c1863 for Sarah based on her reported age on the 1911 English census I checked for possible baptisms for her in Co. Wicklow 10 years either side of 1863 (to allow for inaccurate age reporting..) - about 8 matches showed up, but of these just three had father’s name James.
One was in Arklow town in 1873, so seems too late and not close to Kiltimon, another was in Rathdrum town in 1855 - so seems too early, and again not close to Kiltimon, the third however is much more promising…
Sarah Toole baptised in Kilquade Catholic parish on the 31st January 1860 to parents James Toole and Margaret Neill. No residence is recorded, the sponsors were Michael Roache and Margaret Walshe. The register entry is available on the National Library of Ireland website - see towards the end of the right hand page
A check of the area covered by this Catholic parish shows that it was one of two which covered Kiltimon townland, the second Catholic parish being Wicklow (town). The split in RC parishes was probable due to the townland being divided between two civil parishes.
A further search for the possible sister Jane (the marriage witness) shows a Jane Toole baptised in the same parish on the 10th November 1862 to the same parents. Further searches of baptism and civil births found several siblings Michael 1868, Ellen/Ellena 1871, James 1873, James 1874*, Patrick 1877, Michael 1880* and Anna 1883.
Several of the later baptisms include a family residence - Timore/Tighmore etc, and the civil records are a little more detailed and include an occupation for James - labourer, and also a residence for the family , e.g. James 1873 as Timore. The official placename is Timmore (Tuain Mhór in Irish), this townland is adjacent to Kiltimon - see the map on the entry for Timmore on the placename database, see Kiltimon immediately south of Timmore. Since the father James was a labourer he could have moved around for work, or possibly the family lived right on the boarder of the two townlands.
A search for Timmore/Timore/Tighmore on the 1901 census shows a likely match (mistranscribed as Timnore) for your Toole family still at the same location - mother Margaret , children James and Patrick - both Agricultural Labourers, also in the household are grandsons of Margaret - Mark Toole age 20 & James Toole age 9. Margaret and James jnr. Are still at Timmore in 1911, along with a grandson Mark age 27, with the surname shown as Snell with place of birth Co. Wicklow.
A search for the birth of this Mark Snell shows that he was born in Rathdrum Workhouse on the 26th February 1881 to parents Mark Snell and Sarah Tool, residence for family is show as Timore father's opccupation solider… so further proving this is the correct Toole family…
* the elder children named James and Michael likely died young and the names were reused...