Advice need PLEASE

[1NZYaris1]

hello people , i have just bought the following speakers.
below is the sales blurb , i got them for $139.00NZ shipped.
The Question i have is do i need a amp to run these and can i run them
with out the crossover , as i also have a set with no cross overs.
Probably silly questions ,but i have never used component speakers as such before.


Specifications
732Compliance (Cms)11.3Cone Area (Sd)3.6D.C. Coil Resistance (Re)0.61Electrical Q (Qes)4.897Force Factor (Bl)53Free Air Resonance (Fs)55Hz-22kHzFrequency Response4Impedance (Nominal)Magnet Structure (Oz)260Max Power (Watts)10Mechanical Excursion (mm)3.47Mechanical Q (Qms)65mm (2 9/16")Mounting Depth131mm (5 3/16")Mounting Diameter85RMS Power (Watts)88Sensitivity (dB) (1W/1M)0.519Total Loudspeaker Q (Qts)Reactor
6.5" Component Speaker System
RE-CM650
RRP $229.99

More power, more quality and more bass - Reactor is the angry upgrade to FUSIONs Encounter car audio range and is dripping with technology.

Reactor speakers take the sweet sound handling capabilities of Encounter to the next level. Combining quality close-tolerance polypropylene cones with silk-dome tweeters to produce better sound definition.

Component Speakers feature 3-way attenuation sensitivity to control the level of tweeter output at -3dB, 0 or +3dB and small crossovers for discrete installation.

Butyl rubber surround
Polypropylene cone
High efficiency magnet structure
Round-wound copper voice coil
Pressed steel basket with rubber boot
Silk dome tweeter