Also get thread chasers, you don't want to keep running cutting taps & dies through existing threads as this can shave down material to the point that the threads get weak. This is especially true if you're chasing critical things like the head bolt and holes in the engine block. They get cut once and chased thereafter.
I bought a Craftsman thread restorer kit that handles most of the common metric and Imperial chasers. I bought most of the rest as well as taps & dies from AAA Metric piece meal as I needed them.
'91 Pickup - Imelda
'08 Tacoma TRD - Donna
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein