These are all guesses, its been a while since I last identified any rocks! Weathered pebbles are the hardest rocks to identify, preferably you need to look at a fresh surface and in site to make firm identifications.
Smash some in half to get a better look.
For quartz check the hardness, that's a good indicator a steel file won't scratch it. Vinegar is a test for calcite.
1 looks like it will have lots of quartz and haematite staining.
2 could be granitic, looks to be lots of quartz and pink orthoclase with some darker mafic minerals.
3 doesn't look very schisty to me, but its weathered and not a great pic so hard to tell. Remember schistocity is a texture rather than a particular rock mineralogy.
4 probably quartz.
5 too weathered, maybe quartz or something else entirely.
6 iron ore is unlikely, could be staining due to haematite leaching.
7 probably sedimentary and looks like it has some glittery mica.
8 very difficult due to weathering, more orangy so maybe staining rather than pink feldspars.
9 is being metamorphosed, looks quite gneissic.
10 has what is most likely a nice quartz vein, base rock could be sedimentary although it would have had some altering when vein went in.
11 can't tell, is it the same as 3?
12 looks like a stained limestone?? Chuck some vinegar on to check for calcite.
Please don't trust the accuracy of these guesses!