Hello and Welcome to the forum
I think I have him
I went through all the James Edward's born in Birmingham 1883-1885 and whittled it down to a James Edward Hancox and James Edward Tooth.
The latter born Dec qtr 1883 Birmingham 6D 135 is your man
He joins the Army 25th June 1900 so is not on the 1901 census in Birmingham
He is 17 years 9months
Sallow complexion ,grey eyes and brown hair
5ft 7/8 inches
Rose tatoo back right for arm
Royal Warwickshire Regiment 7895
He is called up again for WWI
He receives a pension Royal Warwickshire Regiment 7601
He is James Edward Tooth
but his widow is Minnie ArcherUnfortunately the document is on the Fold 3 website for which I don't have a subscription.
But the index for it etc is here on Ancestry
https://search.ancestrylibraryedition.co.uk/cgi-bin/sse.dll?dbid=61588&h=1603444&indiv=try&o_vc=Record:OtherRecord&rhSource=8912I can spot him as Edward Tooth age 19 in Barracks at Colchester in 1901.
1891 New Summer St Birmingham
Benjamin Tooth 42 glass blower Wolverhampton
Ann 45? Birmingham
Katie 12
Benjamin 11
Edward James 7
Mary Ann 5
Richard under 1 month
Benjamin Tooth bapt at Wolverhampton St Peters 26 Dec 1846 s of John and Sarah of Stafford St labourer.
He married Emma Sandy at St Martin Birmingham 10.6.1867 but is with a wife Lucy Tooth born 1850 on 1881 census.Children Sarah 8 ,Bertha 2 and Lucy 4
And as I said he is with Ann in 1891 and 1901.(No sign of a death for Lucy)
Ann started life as Ann Cade and married Bishops Ryder 22.12.1872
Thomas Archer 25 iron fitter Emily St Joseph Archer whitesmioth
Ann Cade 24 Emily St Charles Cade well sinker
wit William and Mary Archer
In 1871 they are in Lombard st with a daughter Martha j 11months.
1881 Cheapside
Ann Archer widow 32 burnisher
Martha 10
Emma 7
Lizzie 5
Kate 2
Harriet Cade widow mother 72 Newark Nottingham
It looks like Ann and Benjamin didn't marry so technically James Edward was either Cade,Archer or Tooth .
It might help to get that pension record but it is him and I'm confident his father was Benjamin Tooth born 1846 Wolverhampton and mother Ann Cade born c 1847 d of Charles and Harriet Cade.
Hope that helps and good luck with getting back a bit farther.
Ciderdrinker