Can I have multiple outside LED strip lights coming from one driver?
If your strips are intended for "12VDC" then they require a constant voltage supply. This is the usual arrangement for strips. In this case:


check how much current each strip will use
multiply by the number of strips
get a 12VDC supply with more amps than what you need, like a wall wart or a "led driver" specified to output 12V (which is not really a driver in this case, since it is a constant voltage supply) .
wire all the strips in parallel


If your strips are not specified for 12V but instead should be driven by constant current then you will need a constant current driver per strip. This would be uncommon.