Help can be in any form deemed necessary
SAMP(T) - easy to underestimate the depth of feeling at what is going on in Europe. I think Macron for example does want to help Gaza (although the EU also needs the US for Ukraine), and supplying SAMP(T) could be his way to do so.
If Turkey is willing to buy 40 Eurofighters from the UK to help keep British production lines open, that would be genuinely appreciated and would result in some form of assistance in return (eg naval support for defensive purposes). UK is seriously worried about losing highly skilled engineers if its production lines close.
European NATO can also provide support to Turkey by increasing sanctions on Israel - which have finally reached the stage of freezing Israel out of the UK's prestigious officer training program for example (Israelis are furious and call it treachery).
Yasar_TR mentioned that the US can restrain Israel because Israel depends on US technology and intelligence. I think that is very true, but it is desirable to shift dependence from the US to the UK, France, European NATO, and Pakistan right now because the US continues to backfill Israeli munitions for free. With much of the Israeli government's extreme ideology they are almost stupid not to use munitions at the highest possible rate under this arrangement. I do not think their behaviour will reduce in intensity until the US reduces support, and for that to happen countries need to find ways to reprimand the US.
I do think Turkish air defence is not ready yet from what I read. An F-15, if it starts at mach 2.5, can zoom as high as 80,000 feet - above the maximum operating altitude of Siper Block 1 - so it cannot provide true area denial in the same way as a ring of Siper Block 2. Israel has a few standoff weapons with a range of up to 250km, and it would not need to enter within the range of Siper Block 1 to fire them. I think Turkey will be ready when it has 13+ Siper Block 2 batteries, with which it could encircle an area containing Ankara and Istanbul to prevent Israeli jets getting within range to fire these particular standoff weapons. (15 could be enough to encircle Western Anatolia). Didn't Russia at one point have 56 S-400 batteries - so 13 Siper Block 2 batteries is not unrealistic, Turkey just needs to buy time to manufacture them.
Right now Turkey can outmatch Israel on land and at sea, but not in the air or in terms of nuclear arsenal. Imagine Israel struck Istanbul and Turkey retaliated successfully with a naval barrage - the extremists in charge of Israel could then destroy what is left of Hamas in Istanbul with a nuclear weapon as a "warning" against further Turkish retaliations. If Turkey then took the Golan Heights to show what it thinks of Israeli threats, Israel could fire ten more nuclear weapons at other Turkish cities as a second "warning" - there is only one way that ends even if Turks fought as tenaciously as the Japanese. That is why I would want Pakistan as involved as possible, for example if they could send HQ-9B batteries to Nakchavan, Bara Khware (Iraq), and north of Mosul - as long as Azerbaijan/Iraq agree.