St. Louis has data but without GIS shapes. The data is here: http://www.bettertogetherstl.com/studies/economic-development/tif-database . It was apparently extracted from a 2015 report here: http://dor.mo.gov/pdf/2015TIFAnnualReport.pdf . The locations are google mapped here: http://www.bettertogetherstl.com/tax-incremental-financing-map
The St. Louis County appears to have shapefiles with start dates here: https://worldmap.harvard.edu/data/geonode:slcounty_tif_aqt (but not sure if they cover the city too).
===Philly===